Code:Modes Q- Quick mask mode toggle = view selection as rubylith overlay, accepts paint tools F- Cycles through Normal and 2 full-screen modes — very useful for previewing without clutter Tab- Removes all palettes Ctrl+; - Show/Hide Guides Ctrl+' - Show/Hide Grid Ctrl+R - Show/Hide Rulers Layer Ctrl+Shift+N- New Layer Ctrl+E- Merge Down Ctrl+J- New Layer from selection by Copy Ctrl+Shift+J- New Layer from selection by Cut Ctrl+G- Clipping Group with previous layer Tools V- Move M- Marquee (Shift+M, circular Marquee) C- Crop W- Wand B- Brush E- Eraser S- cloning Stamp N- Line T- Type K- Fill Bucket I- Idropper (eyedropper) G- Gradient fill P- Pen O- Dodge / Burn / Saturate (Shift cycles through) R- bluR / shaRpen / smeaR (Shift cycles through) H- Hand Z- Zoom Color D- Default colours (Foreground/Background to B/W) X- Xchange (Swap) foreground/background colours) Image tweaks Ctrl+M- Gamma Curves Ctrl+L- Levels Ctrl+U- hUe / saturation / lightness Ctrl+B- colour Balance [red] Random Alt+Backspace- Fill with foreground colour Alt+Shift+Backspace- Fill with foreground colour, preserving transparency Shift+F5- Fill dialog box [ ]- [Square brackets] Brush size up/down ctrl+z-undo ctrl+alt+z-undo further Control + K - Removes the grey/blue box in the top left of your canvas. Cntrol + Q - Closes the open document.