Where is the tilemap bar?

I think my brain is having a day off or something is wrong with my editor. I've added my tilemap, I have it selected, but I can't work out how to change the tiles (I've done it a few weeks ago, but can't remember the process). Following the manual, it says to click stuff in the 'tilemap bar', but I see no bar. Where should it be?

On the top-left, click View and then mark the box next to Tilemap Bar

Ah ha, thanks, that's quite well hidden away. Got it now, thank you