To change a keyboard shortcut you have to use the menu Options\Keyboard shortcuts. Once you have chosen a shortcut, the following screen will be opened to change the shortcut:

The info in the box Action repeats the name of the shortcut that will be changed.

You can set up to 3 keystrokes for one action. To do this you have to click on Shortcut n°X and afterwards you push the keystrokes you want or combination of keystrokes you want to use. Repeat this if you want a second and third shortcut.

The button RAZ removes the shortcut. The buttons + lets you chose a special keystroke like: Enter, Insert, Delete, Return.