I'm having a real headache with Photoshop at the moment. For some unknown reason (possibly an unintentional keystroke on my part, although I have no idea which one) a select band of tool keyboard shortcuts, all of which are the sort that temporarily replace the current tool and stop when you let go, have stopped working. The ones I've noticed are: Space (for the hand drag tool) Apple + space (for zoom in tool) Something + space (for zoom out tool) When using the area selection tool (marquee?) the keys that make the next selected area add and subtract from the current selected area This is driving me nuts, as I use them all the time. I've chucked out my preferences to reset them, reset all the tools, trawled through the settings, all to no avail. I know it's going to be something really simple, but I can't figure out what! Help!