Provided by: impressive_0.10.3+svn61-1_all 
NAME
Impressive - presentation tool with eye candy
SYNOPSIS
impressive [OPTIONS...] FILES...
DESCRIPTION
Impressive is a simple presentation program that displays slideshows of image files (JPEG, PNG, TIFF and
BMP) or PDF documents. Rendering is done via OpenGL, which allows for some "eye candy" effects.
OPTIONS
-a <seconds> or --auto <seconds>
Automatically advance to the next page after the given number of seconds. Together with the -w
option (described below), this can be used to create automatic slideshows.
-A <X>:<Y> or --aspect <X>:<Y>
Specifies the display aspect ratio. Normally, Impressive assumes that the pixel aspect ratio is
1:1 (square pixels), regardless of the display resolution that has been set up. If a resolution
has been selected that doesn't match the display's aspect ratio, the screen will be distorted. To
overcome this, this option may be used to manually specify the display aspect ratio, e.g. "-A
16:9". Note that this option has no effect if Xpdf is used for rendering.
-b or --noback
Disabled background rendering. By default, Impressive will pre-render all pages in a separate
background thread while the presentation runs. If this option is specified, it will instead render
all pages immediately on startup. This option has no effect if caching is disabled (--cache none,
see below).
-B <ms> or --boxfade <ms>
Sets the duration (in milliseconds) of the highlight box fade-in/fade-out animation. Default
value: 100 ms.
-c <mode> or --cache <mode>
Specifies the page cache mode to use. Valid options are:
none
Disables page caching altogether, only the current and the following page will be kept in
RAM. Jumping between pages will be very slow, because Impressive will need to render the
requested pages on the fly. In addition, the overview page won't be complete until every
page has been shown at least once.
memory
Caches all page images in memory. This is the fastest method, but it requires very large
amounts of memory (about 3 MiB per page at 1024x768 resolution).
disk
Like above, but uses a temporary file rather than memory for storage. This is the default.
persistent
Uses a permanent cache file for caching. This file will not be deleted when Impressive
quits and will be reused on subsequent invocations. The default name for the cache file is
derived like the names for Info Scripts (see below for an explanation), but with a .cache
file name extension instead of .info. This method is a little bit slower than disk mode,
but the time span until the overview page is fully populated will be significantly
decreased if Impressive is ran again with the same input files and options.
The mode name may be abbreviated at will, down to one character. Thus, --cache persistent, -c
persist and even -cp are all synonyms.
-C <filename>[:<X>,<Y>] or --cursor <filename>[:<X>,<Y>]
This option can be used to specify the path to an image file (typically a transparent .png) that
shall be used as the mouse cursor instead of the default one. Optionally, the hotspot may be
specified (this is the position inside the cursor image where the real mouse position is located).
Example: --cursor mycursor.png:2,4
--clock
If this option is enabled, the current time will be shown instead of the elapsed time if time
display is activated with the T key. Compatible with the -M option.
-d <time> or --duration <time>
Specifies the expected run time of the presentation. The time parameter can be either a number of
seconds or a human-readable time like 1:23 (1 minute and 23 seconds), 4:56h (4 hours and 56
minutes), 3m45s (3 minutes and 45 seconds), 5m (5 minutes) or 1:23:45 (1 hour, 23 minutes and 45
seconds).
If an expected duration is specified, Impressive will show a semi-transparent green progress bar
at the lower edge of the screen, indicating how much time has already passed. If the time is up,
the bar will occupy the whole edge and fade to yellow (at 125% of the expected time) to red (at
150% or more).
-D <ms> or --mousedelay <ms>
Sets the time (in milliseconds) the mouse cursor is shown in fullscreen mode if it is not moved.
Default value: 3000 ms.
-e or --noext
OpenGL normally only supports textures with power-of-two dimensions. This means that for a
1024x768 screen, the actual texture size will be 1024x1024, for 1600x1200 it will even be
2048x2048. To overcome this limit and save texture memory, Impressive will automatically use the
OpenGL extensions GL_ARB_texture_rectangle (available on most graphics cards) or
GL_ARB_texture_non_power_of_two (available on modern graphics cards with current drivers). If
these cause any trouble, the -e option may be used to prevent Impressive from using the
problematic extensions.
-f or --fullscreen
Toggles fullscreen mode. By default, fullscreen mode is activated, and can be deactivated using
this switch.
-F <file> or --font <file>
Impressive uses some kind of text OSD to overlay the current page number and title (if available)
on the overview page. This option can be used to specify a TrueType font file (.ttf) to use for
the OSD. If the path specified doesn't directly point to a useable font file, Impressive will try
to search the system font directories. It assumes that all fonts are stored below /usr/share/
fonts, /usr/local/share/fonts or /usr/X11R6/lib/X11/fonts/TTF for this purpose (the latter one is
useful for Mac OS X systems specifically). If this option is not specified, any of DejaVuSans.ttf
or Vera.ttf (the typical file name of Bitstream Vera Sans) will be used as a default.
-g <width>x<height> or --geometry <width>x<height>
Sets the screen size or resolution Impressive shall use (in pixels). If xrandr is installed, the
default screen size for fullscreen mode is the current screen resolution; on other platforms,
Impressive uses the highest resolution available to the graphics system. If a standard resolution
cannot be determined, the default is 1024x768 pixels. Note that this option is not the standard X
"geometry" option and does therefore not support window positioning (e.g. -g 800x600+0-0 will not
work!).
-G <gamma>[:<blacklevel>] or --gamma <gamma>[:<blacklevel>]
Sets up the startup gamma and (optional) black level value. The black level is the original
image's intensity level (0...254) that is to be mapped to black in Impressive's output. Note that
gamma and black level adjustments may be unavailable or constrained on some systems.
-h or --help
If this option is specified, Impressive writes a short command line help screen to standard output
and does not start a presentation.
-H or --half-screen
This option makes Impressive show the overview page and OSD elements on the right half of the
screen only. The overview page will only show the left half of the slides as previews. Using a
multi-monitor setup with a wide virtual screen and specially crafted slides (e.g. those that can
be generated with LaTeX's beamer class), this makes it possible to have presenter's notes on the
second screen.
Note that transitions and animations are still operating on the whole screen, making some of them
(like PagePeel) look ugly. Impressive also disables the overview zoom animation in half-screen
mode; it can be re-enabled by explicitly setting it to another value with a later command line
option (--zoomtime).
Another limitation is that the allocation of the screen halves (slides left, overview right) is
fixed.
-i <page> or --initialpage <page>
Specifies the page number to start with. The default value is 1 (start with the first page). If
another value is specified, the page shown by Impressive right after initialization is not the
first one of the PDF or image list. Additionally, pre-rendering (if enabled) will also start at
the specified page.
-I <filename> or --script <filename>
Overrides automatic derivation of the info script filename and specifies a script file directly.
-l or --listtrans
If this option is specified, Impressive writes a list of all available transition classes to
standard output and does not start a presentation. Transitions that are enabled by default are
marked with a star (*) left of the class name.
-L <spec> or --layout <spec>
Specified the OSD layout. Read below for an explanation of this option
-M or --minutes
If this option is set, Impressive will show the on-screen timer (activated with the [T] key) only
with 1 minute resolution. By default, it will show a timer with 1 second resolution.
--nologo
This option disables the Impressive logo and version number display. Instead, the loading screen
will be just black or, if background rendering is disabled, only the progress bar will be visible.
--noclicks
If this option is enabled, switching to the previous or next page with the left and right mouse
buttons is deactivated. The keyboard shortcuts are unaffected from this.
-o <directory> or --output <directory>
Do not display the presentation, but render it into a series of PNG image files inside the
specified directory. The images will be generated in the current resolution as specified by the -g
option. This option is useful if you're going to give a presentation on a foreigh PC with an old,
broken or otherwise problematic Xpdf or GhostScript installation: By generating images of the PDF
pages you can ensure that no rendering bugs will happen on the target system.
-O <mode> or --autooverview <mode>
Enables or disables automatic derivation of whether a page shall or shall not be shown on the
overview page. This feature is based on the fact that some LaTeX presentation packages tag all
pages with a title (that can be read by Impressive with the help of pdftk), except those that
contain multiple reveal steps.
The following modes are available:
off
Disables automatic overview mode. All pages will be shown on the overview page by default.
This is also the default setting.
first
All pages with a PDF title will be shown on the overview page. The purpose is to show the
initial state of multi-step slides on the overview page.
last
All pages before a page with a PDF title will be shown on the overview page. The purpose is
to show the final state of multi-step slides on the overview page.
Again, the mode may be abbreviated arbitrarily, down to one character, just like with the -c
option above..
-p <start>-<end> or --pages <start>-<end>
Using this option, the range of the page displayed can be narrowed down. The presentation will
start at the first page in the range. All pages outside of the range will not be shown on the
overview page and will not be cached. However, they can be entered manually when cycling through
the presentation. Due to the fact that these pages are uncached, preparation of the display will
take considerably longer.
-P <path> or --gspath <path>
This option can be used to override the Xpdf / GhostScript path autodetection. The full path to
the executable of either GhostScript (gs or gs.exe) or Xpdf's pdftoppm utility must be specified.
-q or --page-progress
If this option is enabled, Impressive will show a light-blue semi-transparent progress bar at the
lower edge of the screen that shows the position inside the presentation, i.e. the relation
between the current page number and the total number of pages. Note that this progress bar will
not be shown if the duration progress bar (-d option) is also enabled.
-Q or --autoquit
If this option is specified, Impressive quits automatically when trying to navigate to the page
after the last page or the page before the first page.
This option does not have any effect if --wrap is used.
-r <n> or --rotate <n>
Display all pages rotated by nx90 degrees clockwise. Try -r 1 or -r 3 if you run into problems
with PDFs generated by LaTeX on some Xpdf or GhostScript versions.
-R <X>x<Y> or --meshres <X>x<Y>
Most effects subdivide the visible screen into a mesh of rectangular or quadratic pieces, each
with its own coordinates and alpha blend values. Using this parameter, the resolution of the
subdivision mesh can be defined. The default value is 48x36. On slow machines, lower values like
24x18 or 12x9 can heavily speed up transition rendering at the cost of visual quality. On the
other hand, higher values like 64x48 or 96x72 improve quality, but use much more CPU cycles.
-s or --scale (image input only)
If a directory with image files is used as input, Impressive will scale down images that are too
big for the screen. But by default, it will not scale up smaller images to fit the screen; it will
leave a black border instead. This option overrides this setting and enables upscaling of smaller
images.
-s or --supersample (PDF input only)
This switch enables antialiasing by 4x supersampling instead of the normal multisampling method
used by Xpdf or GhostScript. While this usually degrades both visual quality and performance, it
may be necessary for circumventing white strips or moire-like patterns in gradients.
-S <pixels> or --fontsize <pixels>
This option sets the size, in pixels, of the OSD font. The default value is 14.
--spot-radius <pixels>
This option sets the initial radius of the spotlight, in pixels. The default value is 64.
-t <ms> or --transition <trans1[,trans2...]>
Using this switch, the set of transitions Impressive will randomly draw at page changes can be
specified. If only one transition class is specified, this class will be used for all pages that
do not have another transition explicitly assigned in their page properties. Multiple transitions
have to be separated by commas; they will be used in random order. The -l option can be used to
get a list of available transitions.
-T <ms> or --transtime <ms>
Sets the duration (in milliseconds) of page transitions. 0 (zero) disables transitions altogether.
Default value: 1000 ms.
-u <seconds> or --poll <seconds>
If this option is specified, the source file or directory will be checked for changed regularly.
If a change in the input PDF file or any of the image files in the input image directory is
detected, the page cache will be flushed and the current page as well as the info script will be
reloaded. The current page's transition will be shown between the old and the new version of the
page.
The new PDF file must have at least as much pages as the old one; also, it should have the same
aspect ratio. If the input is a directory, image files must not have disappeared.
-V <pixels> or --overscan <pixels>
PDF files often contain tiny amounts of white borders around the edges which look bad in screen
presentations. To eliminate this problem, Impressive uses "overscan": PDF files will not be
rendered to fit the screen size exactly, but they will be rendered a bit larger so that the
(possibly broken) borders can be cropped off. The amount of overscan, in screen pixels, can be set
with this option. The default value is 3 pixels, which should remove borders in most presentations
at most common screen resolutions without cropping the pages too much.
-w or --wrap
If this option is set, Impressive will "wrap" over to the first page after the last page. In other
words, advancing to the next page at the end of the presentation will restart the whole
presentation.
-x or --fade
This option enables a smooth fade-in effect at the start of the presentation and a fade-out effect
just before Impressive quits.
-X or --shuffle
If this option is enabled, the input files will be shuffled into random order before starting the
presentation. The individual pages of PDF input files will stay in their original order, though,
so this option is mainly useful for image presentations.
-z <factor> or --zoom <factor>
Sets the zoom factor that is used in zoom mode. It must be an integer value of at least 2. The
default value is 2. Note that it might not be possible to get high-quality zooming for large zoom
factors due to hardware restrictions.
-Z <ms> or --zoomtime <ms>
Sets the duration (in milliseconds) of the overview page zoom-in/zoom-out effects. Default value:
250 ms.
--cachefile <filename>
Activates persistent cache mode and specifies the name of the cache file to use.
ARGUMENTS
Following the options, the input file name(s) must be specified. Recognized file types are PDF, JPEG,
PNG, TIFF, BMP and PGM/PPM. If the name of a directory is put on the command line, all recognized image
files (no PDF files!) in this directory will be played in alphanumeric order (case-insensitive).
In addition, Impressive can use a text file containing a list of files or directories to show: This text
file must contain at most one file name per line; every character after a hash sign (#) is treated as a
comment and will be ignored. If such a comment is put on the same line as an image file name, it will be
used as the page's title. List file names must be prefixed with an at sign (@) on the command line, e.g.
impressive @my_list_file.
Impressive will also expand wild-card characters (* and ?) if this isn't already done by the shell, but
apart from that, it will not reorder the arguments. Thus, it will show the documents in the order
specified at the command line.
LAYOUT OPTIONS
The OSD layout option (-L/--layout) accepts a string with comma-separated key=value pairs. The following
keywords are recognized:
alpha
The opacity of the OSD text, either as a floating-point value between 0 and 1 or a percentage
between 2 and 100.
margin
The distance (in pixels) of the OSD text to the screen borders.
time
The position of the timer.
title
The position of the page title in overview mode.
page
The position of the page number in overview mode.
status
The position of the status line.
The position specifications are composed by one character that indicates whether the text shall be
displayed at the top (T) or bottom (B) edge of the screen and one character that indicates whether it
shall appear on the left (L), on the right (R) or centered (C).
For example, the default OSD layout equals the following option string:
-L margin=16,alpha=1,time=TR,title=BL,page=BR,status=TL
USAGE
On startup, Impressive will display a black screen with the program logo at the center. If caching is
enabled, but background rendering is disabled, all pages of the presentation will then be rendered once.
A bar in the lower half of the screen displays the progress of this operation. Any key (except for Q and
Esc) or mouse click skips this process, with the effect that Impressive will render the remaining pages
on demand. Please note that the overview page will not be complete until every page has been rendered at
least once. In other words, if the precaching process was skipped, placeholders will be displayed for all
pages that have not been rendered yet. By default, Impressive will build up the cache in the background
while the presentation runs. Thus, the progress bar will not appear and the preparation will only take
the amount of time required to render the first two pages of the presentation.
After this initialization process, Impressive will switch to the first page directly and without any
transition.
CONTROLS
Q key or Esc key
Quit Impressive immediately.
LMB (left mouse button), Page Down key, Cursor Down key, Cursor Right key or Spacebar
Go to the next page (using a transition).
RMB (right mouse button), Page Up key, Cursor Up key, Cursor Left key or Backspace key
Go to the previous page (using a transition).
Home key / End key
Go directly to the first or last page of the presentation.
L key
Return to the last (most recently displayed) page. This can be used to toggle back and forth
between two pages.
F key
Toggle fullscreen mode.
Tab key or MMB (middle mouse button)
Zoom back to the overview page. While in overview mode, a page can be selected with the mouse and
activated with the left mouse button. The right or middle mouse button or the Tab key leave
overview mode without changing the current page.
LMB over a PDF hyperlink
Jump to the page referenced by the hyperlink. Two types of hyperlinks are supported: Links that
point to some other page of the same document, and URL hyperlinks like Web links and e-mail
addresses. This feature is only available if pdftk is installed. Furthermore, xdg-open from the
freedesktop.org Portland project is required for URL links to work. Please note that the
hyperlink feature will not work properly when pages are rotated.
click&drag with LMB (left mouse button)
Create a new highlight box. While at least one highlight box is defined on the current page, the
page itself will be shown in a darker and blurry rendition. Only the highlight boxes will be
displayed in their original lightness and sharpness.
If a page with highlight boxes is left, the boxes will be saved and restored the next time this
page is shown again.
RMB (right mouse button) over a highlight box
If the right mouse button is clicked while the mouse cursor is above a highlight box, the box will
be removed. If the last box on a page is removed, the page will turn bright and sharp again.
S key
Save the info script associated with the current presentation. The main purpose for this is to
permanently save highlight boxes or keyboard shortcuts, so they will be restored the next time
this presentation is started.
T key
Activate or deactivate the time display at the upper-right corner of the screen. If the timer is
activated while the very first page of the presentation is shown, it activates "time tracking"
mode. In this mode, a report of all pages visited with their display duration, enter and leave
times will be written to standard output. This can be very useful when preparing presentations.
R key
Reset the presentation timer.
Return key or Enter key
Toggle spotlight mode. In this mode, the page is darkened in the same way as if highlight boxes
are present, but instead of (or in addition to) the boxes, a circular "spotlight" will be shown
around the mouse cursor position, following every motion of the mouse cursor.
+ key / - key or mouse wheel
Adjust the spotlight radius.
Z key
Toggle zoom mode. When this key is first pressed, the current page will zoom in. The page will be
displayed at double size, but in its original resolution (i.e. it will be blurry). Impressive will
re-render the page at the new resolution if the graphics hardware supports it. During this time,
Impressive will not accept any input, so don't even think about clicking the mouse or pressing
keys before the image gets crisp again.
In zoom mode, all other functions will work as normal. Any operations that leave the current page,
such as flipping the page or entering the overview screen, will leave zoom mode, too.
[ / ] key
Adjust the gamma value of the display (might not be supported on every hardware).
{ / } key
Adjust the black level of the display (might not be supported on every hardware).
\ key
Revert gamma and black level back to normal.
O key
This will toggle the "visible on overview page" flag of the current page. The result will not be
visible immediately, but it can be saved to the info script (using the S key) and will be in
effect the next time the presentation is started.
I key
This will toggle the skip flag of the current page. A page marked as skipped will not be reachable
with the normal forward/backward navigation keys.
B key / W key
Fade to black or white, respectively. This feature can be used if a whiteboard or blackboard in
front of the projection area is to be used during the presentation. Using these two keys, the
screen will fade into a solid color. On any keypress or mouse click, it will fade back to normal.
These keys are not available in overview mode.
click&drag with RMB (right mouse button) in zoom mode
Move the visible part of the page in zoom mode.
Cursor keys in overview mode
Navigate through pages.
Alt+Tab keys
Leaves fullscreen mode to facilitate task switching while running full-screen presentations.
Any other alphanumeric (A-z, 0-9) or function key (F1-F12) can be used to assign shortcuts to pages that
require quick access. If one of the keys is pressed together with Shift, the currently displayed page is
associated with this key. To recall the page later, it is sufficient to press the shortcut key again.
Shortcuts can be permanently stored with the S key.
INFO SCRIPTS
Impressive offers a powerful way to customize individual presentations using so-called info scripts. An
info script is a text file having the same name and located in the same directory as the presentation
file itself, except for the additional suffix .info. Thus, a presentation file called BrandNewProduct.pdf
would have a info script with the name BrandNewProduct.pdf.info. If multiple arguments were specified on
the command line, the info script will be called just .info (a dot file, so to speak). If a directory
name was specified as the only argument, either a file called DirectoryName.info or a file called .info
inside the directory will be used, depending on whether a path separator was specified at the end of the
directory name or not - Impressive simply appends .info to whatever the input path name was.
In any case, the default file name can be overridden by the -I command line option.
Info scripts are actually Python scripts with full access to Impressive's global data structures and
functions. (It is possible to write real interactive applications using info scripts.) Thus, they can
modify a broad range of settings concerning Impressive. This manual will only cover the most basic ones.
PAGE PROPERTIES
The main part of an info script defines the properties of each page. At the moment, the following
properties are defined:
title
Each page can have a title that is displayed in the Impressive window's title bar. If there is no
title explicitly specified in the info script, the title of the page will be extracted from PDF
metadata if pdftk is installed, or the image file name will be used if the presentation is an
image slideshow.
transition
With this property, the transition class to be used for rendering the transition between this page
and the following page can be specified. For pages lacking this property, random transitions will
be chosen. A list of available transition classes can be obtained with impressive -l.
transtime
This property overrides the global transition time parameter (-T at the command line). It contains
the integer time (in milliseconds) the transition between this page and the following page shall
be shown.
overview
This property holds a boolean value (0/False or 1/True) that specifies whether the page shall be
included in the overview page. If this property isn't specified, it is assumed to be True.
skip
This boolean property can be set to 1/True if the page shall be skipped during the presentation.
Pages with overview:True, skip:False will be accessible both by cycling through the pages and
using the overview page,
pages with overview:True, skip:True will be silently skipped in the normal page cycle, but remain
accessible from the overview page,
pages with overview:False, skip:False will appear in the normal cycle, but not on the overview
page
and pages with overview:False, skip:True will not be accessible at all.
boxes
This property stores a list of highlight box coordinates. Normally, there is no need to edit this
by hand, as Impressive handles this automatically if the S key is pressed.
timeout
If a timeout property is present and the page is shown, Impressive will automatically switch to
the next page after the specified number of milliseconds. Normally, the timeout will only be
effective the first time the page is shown unless wrap mode is used (command-line option -w or
--wrap). This restriction makes it possible to create self-running presentations with individual
per-page timeouts.
comment
This property can hold a string with a single line of text that will be displayed on screen while
the page is shown. Display of this text can not be disabled.
sound
Specifies the file name of a sound file to be played (via MPlayer) when the page is first entered.
Once started, the sound will be played until its end is reached, another sound or video is played,
or Impressive is exited.
video
Specifies the file name of a video file to be played when the page is first entered. The video
will be displayed full-screen. Any key or mouse click stops playback, except the cursor keys,
which are used to seek in the video file, and space, which can be used to pause playback. Note
that this function is highly experimental and might not work reliably on every system!
always
If this property is present and set to 1 or True, the media file specified in the sound or video
properties will be played every time the page is entered, not just the first time.
progress
If this property is set to zero, the presentation progress bar (which is usually set up with the
-d/--duration command line switch) will not be shown on this page. In practice, it might be useful
to hide the bar from the first page so that it is not visible during the introduction.
reset
If this property is set to 1 or True, the timer will be reset each time this page is left, just as
if the R has been pressed. If the special value 2 or FirstTimeOnly is used, the reset will only
take place if the page was shown for the first time. Again, this is particularly useful on the
first page: A combination of progress:False, reset:FirstTimeOnly makes it possible to set up the
presentation long before it actually begins - the first page can be showed as long as desired,
actual timing starts at the second page.
rotate
This property is a per-page override of the global -r command line option: It specifies how the
page shall be rotated, in 90-degree steps clockwise.
OnEnter, OnLeave, OnEnterOnce, OnLeaveOnce
These properties can contain a Python callable (i.e. a function reference or lambda expression)
that is executed when the page is entered or left. The ~Once variants will only be executed when
the page is entered or left for the first time. The callable must not take any arguments. This
feature can be used to associate arbitrary Python code with specific pages, for example to execute
external programs.
Warning: Lambda expressions cannot be properly processed by the Info Script save function (S key).
If Impressive encounters lambda expressions when saving, it will remove them. In addition, it will
not overwrite the original info script, but generate an extra file that needs to be merged withe
the original script by hand.
keys
This property can be assigned a dictionary that maps alphanumerical keys to Python functions. For
example, 'keys': { 'x': SomeFunction } will invoke SomeFunction() if the lowercase character 'x'
is typed while the page is displayed. Regarding the functions, the same restrictions as for the
OnEnter/OnLeave family apply: the function must not take any parameters and lambda functions can
not be saved. Also note that it is not possible to overwrite Impressive's pre-defined key bindings
with this method.
The properties are stored together in a Python dictionary called PageProps. The syntax looks like in this
example:
PageProps = {
1: {
'title': "Title Page",
'transition': PagePeel,
'sound': "background_music.mp3"
},
2: {
'title': "Another Page",
'timeout': 5000
}
}
The PageProps definition (and only the PageProps definition) will be rewritten by Impressive if the S key
is pressed. User-defined PageProps entries will also be left untouched, except for some pretty-printing.
GLOBAL PRESENTATION PROPERTIES
The name of the presentation is shown in the title bar of the Impressive window (if not in fullscreen
mode). By default, the file name or (if available) PDF metadata title will be used for this purpose, but
the presentation title can also be explicitly set by overwriting the DocumentTitle variable:
DocumentTitle = "My Presentation"
Another useful variable, AvailableTransitions, contains a list of all transition classes that may be used
for randomly assigning transitions to pages lacking the transition property. Thus, if you want to exclude
a certain transition (either because you don't like it or because you want to have it exclusively on
pages where you manually assigned it using PageProps), you can write something like
AvailableTransitions.remove(WipeBlobs)
On the other side, it's possible to activate transitions that are not enabled by default:
AvailableTransitions += [SlideUp, SlideDown]
Alternatively, you can completely overwrite AvailableTransitions to have the same transition (or set of
transitions) assigned to all pages:
AvailableTransitions = [Crossfade]
OPTION OVERRIDES
Another use of info scripts is overriding the default or command-line settings on a per-file basis. This
can be done by simply overwriting one of the variables that are defined at the beginning of
impressive.py. Each of these variables corresponds either to a command-line setting, or to some constant
related to visual appearance or performance. So, for example, to force fullscreen mode for a
presentation, write
Fullscreen = True
AUTHOR
Impressive and its documentation has been written mainly by Martin J. Fiedler <martin.fiedler@gmx.net>,
with small portions of the code written by external contributors. See the source code file for details.
REPORTING BUGS
Report bugs to to <martin.fiedler@gmx.net>.
Martin J. Fiedler 2012-02-19 IMPRESSIVE(1)