NAME

       libinput-measure-touch-size - measure touch size and orientation of devices

SYNOPSIS

       libinput measure touch-size [--help] [options] [/dev/input/event0]

DESCRIPTION

       The  libinput  measure  touch-size  tool  measures the size and orientation of a touch as provided by the
       kernel.  This is an interactive tool. When executed, the tool will prompt the user to interact  with  the
       touch  device. On termination, the tool prints a summary of the values seen. This data should be attached
       to any touch-size-related bug report.

       This is a debugging tool only, its output may change at any time. Do not rely on the output.

       This tool usually needs to be run as root to have access to the /dev/input/eventX nodes.

OPTIONS

       If a device node is given, this tool opens that device node. Otherwise, this tool searches for the  first
       node that looks like a touch-capable device and uses that node.

       --help  Print help

       --touch-thresholds="down:up"
               Set the logical touch size thresholds to down and up, respectively. When a touch exceeds the size
               in  down it is considered logically down. If a touch is logically down and goes below the size in
               up, it is considered logically up. The thresholds have to be in device-specific  pressure  values
               and it is required that down >= up.

       --palm-threshold=N
               Assume a palm threshold of N.  The threshold has to be in device-specific pressure values.

       If the touch-thresholds or the palm-threshold are not provided, this tool uses the thresholds provided by
       the device quirks (if any) or the built-in defaults.

LIBINPUT

       Part of the libinput(1) suite

                                                                                  libinput-measure-touch-size(1)