Re-join as player button missing?

Hi, I used to use the re-join as player button quite a lot to make sure a dungeon would appear to the players the way I thought I would.  I can't find the button any more. I have been through the guides, which show the exit button and rejoin as player at the bottom of the settings menu. I know the exit has jumped to the top, has re-join as player been removed?  The Ctrl-L function isn't really adequate as I can still see the GM layer that way. 

The button should be at the top along side the exit game button... could you provide a screen shot?

It was recently moved to the top of that panel from the bottom, that's likely why it seems to be missing.

Thanks both, it was missing, but closing and re-opening the R2 sorted everything out.