keyboard shortcut to shift focus from comment to main body of doc

[randomonia]

Title pretty much says it all. For the life of me I can't find a simple keyboard command to move the cursor from a comment back to the main body of the document.

The only roundabout solution I've found is to use Ctrl-G to open the "go to" dialog box, enter +1 to go to the next page in the document and then scroll up. A simple click with the mouse obviously changes the focus but I'm really trying to wean myself from the mouse.

Likewise, I'm trying to find a shortcut for going the opposite direction - from the main body to an existing comment.

TIA

R