<ctrl>+A will select all tracks in the timeline.  Is there a shortcut to de-select all tracks?

Shift Ctrl A

SHIFT <ctrl>+A will deselect all tracks.

Chris

 Andrew, thanks for the quick reply.  By the way, do you know if there's a way to de-select all the "speaker" icons to turn all track monitors off?

Steve Thomas:

By the way, do you know if there's a way to de-select all the "speaker" icons to turn all track monitors off?

Steve Thomas:

By the way, do you know if there's a way to de-select all the "speaker" icons to turn all track monitors off?

SHIFT+Z on my keyboard, because i mapped the "mute"-button from the "play"-register to it

Or you can assign them to your mouse as well. If you have a newer mouse, it often comes with software to assign keystrokes to all the extra buttons. I have my mouse sensitivity buttons (on mine they're small buttons right below the wheel) set to "cntl+a" and "shift+cntl+a". With the click of a mouse button, you can select all, or none. It's speedy and handy.