- Select the command you want to set a hotkey on.
- Open the Context Menu, which is bound to O and Numpad 3 by default.
- Click "Hotkeys".
- Click "Add Hotkey".
- Now press the key you'd like to serve as the hotkey. Keyboard keys and mouse buttons 1-5 are supported.
Bonus Tip: You can assign the same hotkey to multiple commands.