Automatically scroll is greyed out

[default8tr62ovulomv]

Hello

I don't use Adobe a lot, so please excuse ignorance. If I try to initiate auto scroll it won't let me. I can't click on the mouse wheel, Ctrl+Shift+H doesn't work, and View-Page Display-Automatically scroll is greyed out. I can auto scroll in every other application, so what am I missing?

I'm using a four month old pc, Reader was downloaded in the last two months. The pdfs are sent to me from book publishers for me to comment on. Any pointers, please?

Thanks very much.

[default8tr62ovulomv]

Anyone? Please? I get the beginnings of RSI if I keep pressing buttons/roll the wheel, even if I change hands from time to time.

[default8tr62ovulomv]

UPDATE. I hadn't realised that you can't automatically scroll when the pdf is in Commenting mode. Why is this? I closed the Commenting toolbar and now I can automatically scroll, but it would be easier to have the commenting tools to hand.