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. Normally, you would have to move the mouse pointer around the point of interest until hopefully everybody noticed it. With Gromit-MPX, you can draw everywhere onto the screen, highlighting some button or area.
Key features include:
Added new tools SMOOTH and ORTHOGONAL as well as a new undo functionality with compression, reducing memory usage and increasing undo steps from 4 to 100. This version also comes with a menu entry for easier user config file editing.