G XKEYCAPS229, MOTIF_TOYS, Display and edit the X keyboard mapping v 2.29   K xkeycaps is a graphical front-end to xmodmap.  It opens a window that looks L like a keyboard; moving the mouse over a key shows what KeySyms and ModifierI bits that key generates.  Clicking on a key simulates KeyPress/KeyRelease J events on the window of your choice.  It is possible to change the KeySymsG and Modifiers generated by a key through a mouse-based interface.  This I program can also write an input file for xmodmap to recreate your changes 7 in future sessions.  See the man page for more details.   