Here is a list of useful default hotkeys/shortcuts that are extremely useful, but you may not know them. Of course you can override current hotkeys with your own or setup a fully customizable set. These are some of the more useful and highly used default ones.
- [ and ] – will increase or decrease your brush size of the current tool.
- Cmd +/- to zoom in and out of your canvas.
- x – will swap the background and foreground colors.
- d – will reset your background and foreground colors to black and white.
- Shift + Cmd + n – will create a new layer.
- Cmd + Clicking a layer – will select that layers transparency.
- Shift + any tool hotkey will toggle the tools options.
- Here are some of them
- w – magic wand
- v – move tool
- g – fill/gradient
- b – brush
- m – marquee
- l – laso
- Here are some of them
- Cmd + / – will increase and decrease zoom levels.
- Tab – will hide your tool pallets
- f – will toggle the canvas mode (open window, gray frame, gray frame free, black)

