cmd T – transform, and use the shift key to maintain proportion, the cmd key to move a single corner. Remember the warp mode in the menu bar!

brackets – to make brushes bigger and smaller – and the shift with brackets to make brushes harder and softer

cmd D – to deselect – the shortcut that I use most

When using a mask layer-  remember the X key to swop foreground colour from black to white

cmd 0 is useful – to go straight back to full view if you are zoomed in  (cmd + and cmd – to zoom in and out, and space bar to move around)

remember the key to move around the tool bar – B for brush, W of wand V for move S for Stamp E for eraser, m for marquee etc. – if you hover over the tool it will tell you it’s shortcut. also use shift at the same time as the short cut key to scroll through this different options for the tool