Simple drawing tools?

FTR, according to the tool tip (which I only noticed thanks to your comment) it's hold *shift* for a straight line (click, release, hold shift, move somewhere else, click again); holding *ctrl* seems to allow picking a colour out of the image you're working on (another equally useful feature that I'd not noticed before).

Thanks for the hints. I do tend to agree that most of the features being "hidden by default" is a significant issue. Certainly the ones I use most generally seem to be well nested into context menu (and generally I only found them by doing a depth-first search of the menus for a feature that "must exist").

Ewen