FWIW, I set up vertical scrolling and scroll continuously to the end, then set the speed a bit faster than I expect to play. When in use I start and stop the scroll. If I need to go back or jump to someplace in the middle, I use link points. One pedal is set to 'start/stop scroll', the other 'turn page or go to next link point'. I also set the start scroll to 0.
Dell Latitude 13.5" 2-in-1 Ubuntu/Win 11
Samsung Note Pro SM-P900 12.2 Android 5.0.2
Samsung S7+, Android 12
Samsung Note Pro SM-P900 12.2 Android 5.0.2
Samsung S7+, Android 12