I've messed up tag panel

I don't know what I've done. I've managed to move the tag panel from the left hand side of the screen to the top and I cant get it back!

I've tried using key combinations including CTRL + Q but all that does is make it disappear or reappear.

I tried reloading but to no avail.

see here:

Thank you so much for your solution and quick response.

It worked perfectly.