Keyboard, Commanders category, VoiceOver Utility on Mac
Use the Keyboard pane of the Commanders category in VoiceOver Utility to turn on the Keyboard Commander and assign VoiceOver commands to key combinations you create, which might be easier for you to remember or perform.
To open VoiceOver Utility, press Command-F5 to turn VoiceOver on, then press VO-F8.
Note: VO represents the VoiceOver modifier. See Use the VoiceOver modifier.
Enable Keyboard Commander
Turn the Keyboard Commander on or off.
Choose a key to use as the designated Keyboard Commander modifier: Right Option Key, Left Option Key or Both Option Keys.
Keyboard keys assigned to VoiceOver commands.
Commands assigned to keyboard keys.
To assign a different command to a key, click the command field to display pop-up menus for the different types of commands, then choose a command.
Add a key to the list. Type the key, click the Command pop-up menu, then choose a VoiceOver command to assign to the key.
Delete a key from the list.