I was able to set up a hacky way to "override" the left/right arrow keys during desktop preview by assigning them both as "Speech/Playback" type actions, so they'll try to play audio instead of navigating slides/artboards.
The trick, however, is you have to enter in a spacebar blank inside the speech text field, so it will play nothing. If you forget to hit the spacebar (leaving a blank) inside the speech text field, it won't work.
I was able to set up a hacky way to "override" the left/right arrow keys during desktop preview by assigning them both as "Speech/Playback" type actions, so they'll try to play audio instead of navigating slides/artboards.
The trick, however, is you have to enter in a spacebar blank inside the speech text field, so it will play nothing. If you forget to hit the spacebar (leaving a blank) inside the speech text field, it won't work.