@ Alex: I never noticed the x, y input boxes on the preview tab... not the most obvious place!
The tool tip would be very nice though & yeah sure the keyboard shortcut makes sense too.
Speaking of keyboard shortcuts... Any chance of adding keyboard shortcut of Space bar + left click & drag for dragging the preview contents around as an alternative to middle mouse button? My reason is because not everyone has access to middle mouse button (people using touchpads mostly).
@ Esmeralda - the top left snap thing was because images & animation positions are based on the top left pixel of the whole image. But you are correct that it's not always a good idea to have it snap. I don't think the coordinates tool-tip would be much use for non-snapped images though.