Create new document // Ctrl+N
Width & Height // Choose pixel dimensions
Resolution // Choose 72 pixels/inch for digital, 300 for high quality print
Colour mode // RGB colour for screen, 8 bit for non HDRI images
Background contents // Solid or transparent
Zoom // Ctrl+, Ctrl- or Ctrl+Mouse Wheel
Pan // Hold Space Bar, Hold L-mouse button, drag
Fit to screen // Ctrl+ Zero
Cycle workspace styles // F
Arrange workspace // Window/Arrange
Show Rulers // View/ Rulers. Ctrl+R
Undo // Ctrl+Z
Multiple undo // Ctrl+Alt+Z
Rotate canvas // R, ESC returns to normal view
Hide layer Palette> // F7
Show tools // Window, choose tool
Smart Guides // View/ Show/ Smart guides
Create a Guide // View, Show rulers, drag from the ruler, hold Alt to rotate
Snap Guide to ruler // Hold Shift while dragging guide
Move a Guide // V – Move tool
Snap to a Guide // View, Snap
Create a grid // Edit/Preferences/ Guides, Grid & Slices
Hide/Show extras (Guides, marquee, grid) // Ctrl + H
Crop // Select crop tool, marquee area to crop, hit return
Extension-Crop // Extend the crop beyond the dimensions of your document
Crop From Selection // Make a regular selection, Image/Crop
Perspective Crop // Useful for squaring up images to use as textures
Save // Ctrl+S, File/ Save, File/ Save as
Common Formats you may encounter //
.PSD // Native Photoshop format, multiple layers and alpha channels
.PSB // Photoshop format for very large files (Over 30,000 x 30,000 pixels)
Output
.JPG // Compressed, usually for the web, or where a low file size is important
.TIFF // Tagged Image FIle format. High quality Print, uncompressed or lossless compressed
.PNG // Portable network graphics. Lossless compression format, 24bit RGB or 32bit RGBA
3D Render formats
.TGA // Targa, contains Single Alpha 32bit RGBA
.EXR // Open EXR, contains multiple RGB and Alpha channels, 16bit integer or 32bits per pixel floating point
