Provided by: alttab_1.3.0-1_amd64 
NAME
alttab - the task switcher
SYNOPSIS
alttab [-w N] [-d N] [-sc N] [-mk str] [-kk str] [-bk str] [-mm N] [-bm N] [-t NxM] [-i
NxM] [-vp str] [-p str] [-s N] [-theme name] [-bg color] [-fg color] [-frame color] [-font
name] [-v|-vv]
DESCRIPTION
The task switcher designed for minimalistic window managers or standalone X11 session.
Unlike task switchers integrated in most simple WMs, alttab features visual interface and
convenient tactile behaviour, switching windows on releasing Alt key.
Being lightweight and depending only on core X11 libs, it still features customizable look
and behaviour.
OPTIONS
Most command line options have corresponding X resource, see doc/alttab.ad for example.
-w NUMBER
resource: alttab.windowmanager
default: autodetect, fallback to 3
Control how to obtain window list and set focus. NUMBER must be between 0 and 3:
0: No WM, raw X.
Set this value manually, as it´s not autodetected. Only top-level viewable children
of root window are listed. Running -w 0 under WM is discouraged: hidden windows or
windows on another desktops will not be listed; instead, some strange windows may
be included.
1: EWMH compatible.
Compatible WM list is in [SEE ALSO] below. alttab functions in xmonad (EWMH must be
allowed, details in doc/wm-setup.md), i3, evilwm, xfwm4, metacity, jwm, openbox,
fluxbox, icewm, enlightenment, blackbox, aewm, fvwm, sawfish. The following WMs
support EWMH partially but work in -w 1 mode too: dwm (issue #9), matchbox (issue
#34), windowmaker (issue #9), xpra (issue #37), cwm (issue #35), ctwm (issue #39),
lwm (issue #40), awesome (issue #41).
2: Ratpoison.
Alttab uses ratpoison own remote control capability. Additionally, alttab registers
itself in its "unmanaged list" automatically.
3: Ancient WM.
Fallback, worse than 0. Search for application windows at random nodes of window
tree (WM is probably reparenting) and select only those with a name, including
non-viewable (WM is probably iconifying). May cause lag. Tested in twm, flwm, wm2.
-d NUMBER
resource: alttab.desktops
default: 0
Show windows belonging to desktops (workspaces, groups). NUMBER must be between 0
and 3:
0: Current desktop.
This is default, although in non EWMH-compatible WM, except ratpoison, it´s
effectively the same as 1.
1: All desktops.
2: All desktops, excluding special (-1) one.
In various EWMH WM this desktop may be designed hidden or containing sticky
windows. In i3, it´s "scratchpad".
3: All desktops, excluding current and special.
-sc NUMBER
resource: alttab.screens
default: 1
Show windows belonging to xrandr/xinerama screens. NUMBER must be 0 or 1:
0: Current screen.
As defined according to -vp pointer or -vp focus.
1: All screens.
This is default.
-mk str
resource: alttab.modifier.keysym
default: Alt_L
Keysym of main modifier. String or number accepted. Suitable examples: Control_L,
Super_L.
-kk str
resource: alttab.key.keysym
default: Tab
Keysym of main key. For example, grave (aka tilde), Escape.
-bk str
resource: alttab.backscroll.keysym
default: any Shift, according to ShiftMask
Keysym of backward scroll key.
-mm NUM
resource: alttab.modifier.mask
OBSOLETED, guessed from -mk instead.
-bm NUM
resource: alttab.backscroll.mask
OBSOLETED, guessed from -bk instead.
-t NNxMM
resource: alttab.tile.geometry
default: 112x128
Size of a single tile (mini-window). If switcher doesn´t fit the viewport (-vp),
tile may be thinner.
-i NNxMM
resource: alttab.icon.geometry
default: 32x32
Size of icons.
-vp str
resource: alttab.viewport
default: focus
Limit viewport for the switcher. The switcher always has variable size and
position, but tries to never break out of -vp container, while -p specifies
position relative to this container. Together these options allow for multi-monitor
support. Possible values for -vp:
focus: in multihead configuration: the monitor which shows largest part of
currently focused window. If this part is shared with other monitors, then the
smallest of these monitors is choosen. In single head configuration: the geometry
of default root window.
pointer: the monitor which has mouse pointer, otherwise the same as focus.
The "multihead" above means more than one active XRANDR output. They are detected
at runtime, so hopefully monitors may be attached/detached without restarting
alttab.
total: the geometry of default root window.
If you specify this in tiling multihead, then the switcher will be drawn relative
to the entire combined screen, crossing monitors´ borders.
WxH+X+Y: Specific position relative to default root window.
This allows for static manual bounding if XRANDR detection fails. Suppose X
operates in tiling configuration for two 2560х1440 monitors, resulting in combined
screen of 5120x1440 size. Then the switcher may be positioned at the center of the
right monitor with -vp 2560x1440+2560+0 -p center.
-p str resource: alttab.position
default: center
Position of switcher: "center", "none" or specific position relative to upper left
corner of viewport, in the form +X+Y.
-s NUMBER
resource: alttab.icon.source
default: 2
Source of icons. NUMBER must be between 0 and 3:
0: Use icons from X11 window attributes only.
1: Load icon from file if not found in window attributes.
Alttab searches for PNG icons under:
/usr/share/icons
/usr/local/share/icons
~/.icons
~/.local/share/icons
Directory structure should obey freedesktop standard, but desktop files are
ignored, instead file name is expected to be equal to application class. That is,
if alttab doesn´t recognize an icon for window of class foo, as obtained by ´xprop
WM_CLASS´, then just drop a 32x32 icon into
/usr/local/share/icons/hicolor/32x32/apps/foo.png.
2: Prefer icon from file when it matches requested size better (see -i option).
3: Use icons from files only.
-theme name
resource: alttab.theme
default: hicolor
Desktop theme for application icons. Used when -s is 1, 2 or 3.
The following three options accept color names or #rrggbb. Special value _rnd_low or
_rnd_high produce random color from lower or upper RGB space respectively.
-bg color
resource: alttab.background
default: black
Tile background color.
-fg color
resource: alttab.foreground
default: grey
Foreground color.
-frame color
resource: alttab.framecolor
default: #a0abab
Color of frame around selected tile.
-font name
resource: alttab.font
default: xft:sans-10
Label font name in format: xft:fontconfig_pattern, like in emacs and rxvt. See [SEE
ALSO] for fontconfig pattern. It´s neither GTK font pattern nor legacy XLFD.
Your Xresources database probably already has *background, *foreground or *font wildcard
definitions, which alttab will obey. Precedence order (preferred first):
alttab.font resource,
-font option,
wildcard resource like *font in xfd: format.
-v, -vv
resource: no
default: silent
Verbosity.
-h short help
CAVEATS
Run alttab after WM, or autodetection will fail.
AUTHOR
Copyright 2017-2018 Alexander Kulak <sa-dev AT rainbow POINT by>.
REPORTING BUGS
Please report issues on github https://github.com/sagb/alttab/issues.
SEE ALSO
skippy-xd(1)
EWMH compatible WM list
https://en.wikipedia.org/wiki/Extended_Window_Manager_Hints#List_of_window_managers_that_support_Extended_Window_Manager_Hints.
Description of fontconfig pattern
https://www.freedesktop.org/software/fontconfig/fontconfig-user.html.
April 2018 ALTTAB(1)