Re: New Photoshop alternative for Linux - Pixeluvo...
No you're not being dumb at all!
If you click on the crop tool (left hand side of screen), you can choose the amount you wish to crop, in pixels, on from the bottom of the screen.
However, It might be easier to use the selection tool instead, mark out the area to be retained inside the selection. Then go image>crop to selection.
I might have a chat to the vendor an see whether he can add some more crop options, like a dragable bar and possibly allow to change the aspect ratio for cropping too.
Cheers.
Windows free since '09 - never looked back!