[KevinH]

When I do that (hit enter in BookBrowser) it does a file rename as it was designed to do to make fast, only keyboard, renaming possible (much like a spreadsheet).

There are already keyboard shortcuts to open the previous or next BookBrowser file in a tab (without need to move focus to the BookBrowser first). And keyboard shortcuts to close and open previous and next tabs, again with focus never having to leave CodeView.

So if you want to navigate someplace and open a new tab, you can already do that via the keyboard with no need to change focus.

Since the Table of Contents is a generated table, navigating via BookBrowser or keyboard shortcuts from CodeView would be more complete and is already possible.

So how would hitting return/enter in BookBrowser be equivalently handled in the TableOf Contents and why is it really needed since keyboard equivalents already exist.

If others agree it should act like a mouse click, that is easily doable but I really hate to add redundant ways to accomplish navigation from the keyboard. The Sigil UI is complicated enough. But I am willing to be swayed if others agree with you.