xkeycaps is a graphical front-end to xmodmap. It opens a window that looks like a keyboard; moving the mouse over a key shows what
xkeycaps-2.46: description + notes
Modifierbits that key generates. Clicking on a key simulates
KeyPress/KeyReleaseevents on the window of your choice. It is possible to change the
Modifiersgenerated by a key through a mouse-based interface. This program can also write an input file for xmodmap to recreate your changes in future sessions.
The XKeyCaps Home Page has on-line documentation, screenshots, etc.
To auto-install this package, go back and click on the respective install icon.