I would like to highlight or use the pen while listening to read aloud.

Currently one must exit read aloud, highlight/draw, then reactivate read aloud, interrupting flow.

This app is incredibly powerful for studying/note-taking for folks with adhd or slow readers. Allowing marks while TTS would be game changing for flow state. That is something i would actually pay for.

If you realize how powerful this app could be as a studying tool (and not just a pdf signer) Adobe reader could corner the note-taking app market.