F1 - Toggles Adobe Online Help F5 - Toggles Brush style palette F6 - Toggles Colour, Swatches, Styles palette F7 - Toggles Layers, Channels, Paths palette F8 - Toggles Navigator, Info palette F9 - Toggles Actions, History, Presets palette Tab (Key) - Toggles all the palettes on screen Shift + Tab (Key) - Toggles palettes on screen, excluding the Toolbar. Ctrl Short Cuts -Ctrl + N - New Document Dialogue Box Ctrl + M - Curves Dialogue Box Ctrl + A - Selects all in the currently foreground document or currently selected layer Ctrl + J - Automatically creates a duplicate of the currently selected layer Ctrl + K - Preferences Dialogue Box Ctrl + L - Levels Dialogue Box Ctrl + F4 - Closes current document Ctrl + ' (Single Quote Key) - Toggles Grid Lines Ctrl + Q - Quits Photoshop altogether Ctrl + R - Toggles Rulers Ctrl + U - Hue/Saturation Dialogue Box Ctrl + O - Opens New File Ctrl + P - Print Dialogue Box Ctrl + Z - Undo last Action Ctrl + Tab - Toggle between open documents Ctrl + Shift + C - Copy Merged Ctrl + C - Copy Ctrl + H - Toggle Extras Ctrl + ; - Toggle Guides Ctrl + Shift + ; - Toggle Snap Ctrl + X - Cut Ctrl + Alt + Shift + X - Pattern Maker Ctrl + V - Paste Ctrl + Shift + V - Paste into selection Ctrl + Alt + Shift + V - Paste Outside Ctrl + T - Transform Tool Ctrl + Shift + T - Repeats the last performed Transform Shift + F5 / Shift + Backspace (Key) - Fill Layer Dialogue Box Combination Number 9 Shortcuts - Ctrl + Shift / Alt - Ctrl + Shift + O - Photoshop's File Browser Ctrl + Shift + P - Page Setup Dialogue Box Ctrl + Shift + S - Save As Dialogue Box Ctrl + Shift + K - Color Setting Preferences Box Ctrl + Shift + F - Fade Dialogue Box Ctrl + Shift + X - Liquify Filter Tool Ctrl + Shift + N - Create New Layer Preferences Box Ctrl + Shift + M - Launches ImageReady Ctrl + Shift + E - Merges all layers into a single layer Ctrl + Alt + Z - Step Backward Ctrl + Shift + - (Minus Sign Key) - Zoom Out Ctrl + Shift + + (Plus Sign Key) - Zoom In Ctrl + Shift + Alt + N - Creates a new empty layer Ctrl + Shift + Alt + S - Save For The Web Dialogue Ctrl + Alt (in most Dialogue Boxes) - Changes the 'Cancel' command to 'Reset' Ctrl + Alt (in the 'Save For Web Dialogue') - Changes the 'Cancel' command to 'Reset' & the 'Done' command to 'Remember' Ctrl + Alt + ~(Tild Symbol) - Selects the brightest area of the currently selected layer Ctrl + Shift + I - Inverts a selection Ctrl + Alt + X - Extract Shift + -/+ signs(on a layer) - Toggles the different layer modes Shift + Ctrl + Z - Step Forward File Menu Shortcuts: Ctrl+N: New Document Ctrl+O: Open Document Shift+Ctrl+O: Browse Alt+Ctrl+O:Open As Ctrl+W: Close Ctrl+Shift+W: Close All Ctrl+S: Save Ctrl+Shift+S: Save As Ctrl+Alt+S: Save a Copy Ctrl+Alt+Shift+ S: Save for Web Ctrl+Shift+P: Page Setup Ctrl+Shift+M: Jump to Image Ready Ctrl+Q: Exit Viewing Shortcuts: Ctrl+Y: Proof Colors Ctrl++: Zoom In Ctrl+-: Zoom Out Ctrl+Alt++: Zoom In & Resize Window Ctrl+Alt+-: Zoom Out & Resize Window Ctrl+Alt+0: Actual Pixels Ctrl+Shift+H: Show/Hide Target Path Ctrl+R: Show/Hide Rulers Ctrl+Shift+; : On/Off Snap Ctrl+H: Show/Hide Extras Ctrl+Alt+;: Lock Guides Ctrl+;: Show Guides Ctrl+': Show Grid Tools Shortcuts: A: Path Component Selection Tool B: Paintbrush Tool C: Crop Tool D: Changes Default Colour Palettes To Black Foreground, White Background E: Eraser Tool F: Cycle Screen Modes G: Gradient Tool H: Hand Tool I: Eyedropper Tool J: Airbrush Tool K: Slice Tool L: Lasso Tool M: Marquee Tool N: Notes O: Dodge/Burn/Sponge Tool P: Pen Tool Q: Quick Mask R: Blur/Sharpen/ Smudge Tool S: Clone Stamp T: Type Tool U: Shape Tool V: Move Tool W: Magic Wand X: Swap Colours On Colour Pallete Y: History Brush Z: Zoom Tool Ctrl+Shift+N: New Layer Ctrl+J: Layer via Copy Ctrl+Shift+J: Layer via Cut Ctrl+G: Group with Previous Ctrl+Shift+] : Bring to Front Ctrl+]: Bring Forward Ctrl+[: Send Backward Ctrl+Shift+[ : Send Back Ctrl+E: Merge Layers Ctrl+Shift+E: Merge Visible Image Manipulation Shortcuts: Ctrl+L: Adjust Levels Ctrl+Shift+L: Adjust Auto Levels Ctrl+Alt+Shift+ L: Adjust Auto Contrast Ctrl+M: Adjust Curves Ctrl+B: Adjust Color Balance Ctrl+U: Adjust Hue/Saturation Ctrl+Shift+U: Desaturate Ctrl+I: Invert Ctrl+Alt+X: Extract Filters Shortcuts: Ctrl+F: Last Filter Ctrl+Shift+F: Fade Ctrl+Alt+X: Extract Ctrl+Shift+X: Liquify Ctrl+Shift+Alt+ X: Pattern Make Selection Shortcuts: Ctrl+A: Select All Ctrl+D: Deselect Ctrl+Shift+D: Reselect Ctrl+Shift+I: Inverse Ctrl+Alt+D: Feather Random Shortcuts: Alt+Backspace: Fill with Forground Color Shift+Backspace: Fill with Background Color Alt+]: Ascend through Layers Alt+[: Descend through Layers Shift+Alt+]: Select Top Layer Shift+Alt+[: Select Bottom Layer Tab: Show/Hide All Palettes But Which version of photoshop you are using??