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GROMIT-MPX(1) General Commands Manual GROMIT-MPX(1)

Gromit-MPX - Presentation helper to make annotations on screen

gromit-mpx [options]
 

Gromit-MPX enables you to make multi-pointer annotations on your screen. It can run in the background and be activated on demand to let you draw over all your currently running applications. The drawing will stay on screen as long as you want, you can continue to use your applications while the drawing is visible.
 
Gromit-MPX is XInput-Aware, so if you have a graphic tablet you can draw lines with different strength, colour, erase things, etc.
 
Since you typically want to use the program you are demonstrating and highlighting something is a short interruption of you workflow, Gromit-MPX is activated by either a hotkey or a repeated invocation of Gromit-MPX (the latter can e.g. used by other applications or your windowmanager).
 

By default, Gromit-MPX grabs the "F9" key (this can be changed using the "--key" option), making it unavailable to other application. The available shortcuts are:
F9
toggle painting
SHIFT-F9
clear screen
CTRL-F9
toggle visibility
ALT-F9
quit Gromit-MPX

A short summary of the available commandline arguments for invoking Gromit-MPX, see below for the options to control an already running Gromit-MPX process:
-a, --active
start Gromit-MPX and immediately activate it.
-d, --debug
gives some debug output.
-k <keysym>, --key <keysym>
will change the key used to grab the mouse. <keysym> can e.g. be "F9", "F12", "Control_R" or "Print". To determine the keysym for different keys you can use the xev(1) command. You can specify "none" to prevent Gromit-MPX from grabbing a key.
-K <keycode>, --keycode <keycode>
will change the key used to grab the mouse. Under rare circumstances identifying the key with the keysym can fail. You can then use the keycode to specify the key uniquely. To determine the keycode for different keys you can use the xev(1) command.
-o, --opacity <value>
will set the initial opacity of the window using a floating point value between 0 and 1.
-u <keysym>, --undo-key <keysym>
will change the key used to undo/redo strokes. <keysym> can e.g. be "F9", "F12", "Control_R" or "Print". To determine the keysym for different keys you can use the xev(1) command. You can specify "none" to prevent Gromit-MPX from grabbing a key.
-U <keycode>, --undo-keycode <keycode>
will change the key used to undo/redo strokes. Under rare circumstances identifying the key with the keysym can fail. You can then use the keycode to specify the key uniquely. To determine the keycode for different keys you can use the xev(1) command.

A sort summary of the available commandline arguments to control an already running Gromit-MPX process, see above for the options available to start Gromit-MPX.
-c, --clear
will clear the screen.
-q, --quit
will cause the main Gromit-MPX process to quit.
-t, --toggle
will toggle the grabbing of the cursor.
-v, --visibility
will toggle the visibility of the window.
-y, --redo
will redo the last undone drawing stroke.
-z, --undo
will undo the last drawing stroke.

GDK_BACKEND
Set to force use of a particular backend, valid values are x11 or wayland.
XDG_CONFIG_HOME
Directory to search for user's custom configuration file, defaults to ~/.config/.

gromit-mpx.cfg
Configuration file which defines pens and maps mouse buttons and modifiers to them. Searched for in user's custom configuration file directory and, if not found there, in /etc/gromit-mpx/.

When there is no compositing manager such as Compiz, xcompmgr or Mutter running, Gromit-MPX falls back to a legacy drawing mode. This may drastically slow down your X-Server, especially when you draw very thin lines. It makes heavy use of the shape extension, which is quite expensive if you paint a complex pattern on screen. Especially terminal-programs tend to scroll incredibly slow if something is painted over their window.

Simon Budig <simon@gimp.org> Christian Beier <dontmind@freeshell.org>
This manual page was written by Pierre Chifflier <chifflier@cpe.fr> and Simon Budig for the original Gromit and extended for Gromit-MPX by Christian Beier.
November 3, 2018 x86_64