Gromit-MPX is an on-screen annotation tool that works with any Unix desktop environment under X11 as well as Wayland. Its main use is for making presentations of some application. How Use: F9: toggle painting SHIFT-F9: clear screen CTRL-F9: toggle visibility ALT-F9: quit Gromit-MPX F8: undo last stroke SHIFT-F8: redo last undone stroke