move back and forward only for the viewed slides
I wish I could move back and forward only for the viewed slides (for the entire timeline).
In addition I would lock, from the menu, all slides not yet viewed.
I can implement this logic using the default player?
at this moment, I managed to lock the slides not yet viewed through a variable. The problem is the menu, the menu must be visible but I can't allow to select the slides not yet viewed.
I am attaching an example that I made quickly