I like using the keyboard, and minimizing mouse use. Would like to toggle
between text and comments. How can I do that? Is it easier (if even
possible) to do it with the format where comments are on the right, or where
there is a separate pane at bottom. And how do I enable that pane at bottom
(or am I thinking of Adobe Acrobat, which does that?).

Thx.
--
Boris