.TH libinput-measure-touchpad-size "1"
.SH NAME
libinput\-measure\-touchpad\-size \- measure the size of a touchpad
.SH SYNOPSIS
.B libinput measure touchpad\-size [\-\-help] WxH [\fI/dev/input/event0\fI]
.SH DESCRIPTION
.PP
The
.B "libinput measure touchpad\-size"
tool measures the size of a touchpad. This is an interactive tool. When
executed, the tool will prompt the user to interact with the touchpad. The
tool records the axis ranges and calculates the size and resolution based on
those. On termination, the tool prints a hwdb entry that can be added to the
.B 60-evdev.hwdb
file provided by system.
.PP
For details see the online documentation here:
.I https://wayland.freedesktop.org/libinput/doc/latest/absolute-coordinate-ranges.html
.PP
This is a debugging tool only, its output may change at any time. Do not
rely on the output.
.PP
This tool usually needs to be run as root to have access to the
/dev/input/eventX nodes.
.SH OPTIONS
This tool must be provided the physical dimensions of the device in mm.
For example, if your touchpad is 100mm wide and 55mm high, run this tool as
.B libinput measure touchpad-size 100x55
.PP
If a device node is given, this tool opens that device node. Otherwise, this
tool searches for the first node that looks like a touchpad and uses that
node.
.TP 8
.B \-\-help
Print help
.SH LIBINPUT
Part of the
.B libinput(1)
suite