This table describes the current keyboard accelerators. The '^' character means that you have to hold down the 'Ctrl' key along with the second key. Key Function ^C Copy to clipboard Ctrl+Insert Copy to clipboard ^V Paste from clipboard Shift+Insert Paste from clipboard ^O Open new file ^S Save current image to disk ^Z Undo the last operation ALT+Backspace Undo the last operation ALT+Z Re-do the last operation ^F Zoom the window to the extents of the entire image ^W Zoom to the horizontal extents of the image ^H Zoom to the vertical extents of the image ALT+S Zoom to original resolution of the image ^R Start the rectangular region extents mode ^Q Cancel the current region Shift+DEL Close current image