Overwrite shortcut

[Manuel Guittet]

I have a Mac G4 and within the Word application, shorcuts are assigned to
various keys of the keyboard. For example alt-a types the special character
ć

I want to assign another macro in Word to this keyboard combination.

I successfully assigned macros to some key combinations, such as
ctrl-alt-shift A, but when I want to assign a macro to some key
combinations, the software does not let me.

Is it possible, and if yes, how should I proceed?

Thanks for any help on the subject.

MG