How to customize keyboard shortcuts for function keys on UI?

hello guys,
I've been trying to use glade to write UI recently,
I see that in AXIS it is possible to define keyboard keys to some UI function keys (eg : F1=>Emergency stop), I don't know where to start?
I saw in the forum that AXIS consists of axis.tcl and axis.py, where should I look to implement my own keys?
thanks in advance for your pointers.
thanks，
chen

Its easier to do it in usercommand file

linuxcnc.org/docs/devel/html/gui/axis.html#_user_command_file


Here is the doc example

linuxcnc.org/docs/devel/html/gui/axis.ht...h_keyboard_shortcuts

www.tcl.tk/man/tcl8.6/TkCmd/bind.html