Related Links: [Game Basics] - [Personal Store] - [Party] - [Guild] - [Gens] - [MU Helper]
Like all typical MMO games, [MU Online] requires a mouse and keyboard to play.
- [Left click]: action button
- [Right click]: alternative action button
- [Middle click]: start/stop [MU Helper]
- [Scroll wheel]:zoom the camera in/out
- [1] ~ [9] & [0]: [Skill] [Hot-keys]
- [Q], [W], [E], [R]: consumable item [Hot-keys]
- [Space Bar]: pick up items
- [Ctrl]: hold the key to perform [PVP] attacks
- [Ctrl] + [Z]: mount to equipped [Muun] item
- [Alt]: toggles the display of names of items on the ground
- [Alt] + [Right click]: on any character - opens [Character Commands].

- [I],[V]: opens [Character Inventory]
- [S], while [Character Inventory] is open: - opens [Personal Store]
- [K]: [Gremory Case]
- [C]: opens [Character Menu]
- [U]: opens [Skill Menu]
- [Z]: [MU Helper] options
- [M]: [Warp Command Menu]
- [T]: opens [Quest Menu]
- [Y]: opens [Muun Menu]
- [D]: [Character Commands]
- [F]: [Friends List] & [Mail]
- [B]: [Gens Menu]
- [G]: [Guild Menu]
- [A]: opens [Master Skill Tree]
- [Ctrl] + [A]: opens [Enhance Skill Tree]
- [N]: [Party] & [Guild] [Matching]
- [X]: [Cash Item Shop]
- [P]: opens [Personal Store List]
- [J]: [Facebook] app
- [END]: opens [Hunting Log]
- [O]: opens [Option Menu]
- [ESC]: [System Menu]
- [Tab]: opens the [Mini-map]:
- "[": increases opacity
- "]": decreases opacity
- [-]: reduces size
- [+]: increases size

- [Enter]: opens [Chat Box]
- [Up]\[Down Arrow], while the [Chat Box] is open: personal chat history
- [F1]: [Play Guide]
- [F2]: [Block] list
- [F5]: toggles [Chat Box] display
- [F9]: toggles [Gens] chat display
- [F10]: toggle [Public] chat display
- [F11]: displays the most recent message
- [F12]: toggles [Guild] chat display
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