Keys and commands

Every client shortcut and the chat commands any player can use.

Updated on August 10, 2026

MU is played with the mouse: left click walks and attacks, right button fires the selected skill. There is no WASD for moving your character. The keyboard is there to open windows, switch skills, drink potions and a dozen other things that save you clicks.

Windows and panels

Key	What it opens
I or V	Inventory. Both keys work.
C	Character panel: stats, gear score and rank.
T	Quest window.
P	Party.
G	Guild.
F	Friend list. Requires level 6 and does not open in Chaos Castle.
A	Master Skill Tree. Only shows up from the third class on.
N	Enhance Skill Tree, the fourth class tree.
M	Move window, for traveling between maps.
D	Command window. Blocked in Chaos Castle and on Gens maps.
U	Window menu.
B	Gens ranking.
Z	MU Helper settings.
X	Cash shop.
TAB	Game map, in a window.
F1	Help window.
ESC	Closes the open window. With none open, it opens the system menu.

With the inventory open there are four more keys: S opens the personal store, K opens the inventory extension, L turns on repair mode and H opens the vault extension (when the vault is extended). In the shop of an NPC that repairs, SHIFT + L repairs everything at once.

Combat and skills

Key	What it does
1 to 9 and 0	Uses the skill in the slot. There are ten slots, five visible at a time.
CTRL + 1 to 9 and 0	Registers the skill in the slot. You need the skill list open and the mouse over the icon.
SHIFT + 1 to 4	Pet commands, when the creature in play accepts commands.
CTRL held	Forces an attack on a player. It is what lets you attack someone who would not normally be a target.
SHIFT held	Attack without moving: with SHIFT down, clicking the ground does not move your character.
ALT + right button	Opens the quick menu over the selected player, if they are nearby.
SPACE	Picks up the nearest item on the ground.
ALT held	Shows the names of items lying on the ground.
ALT (single tap)	Pins the item names on the ground until you press it again.
F8	Turns the monster health bar on and off.
HOME	Turns the MU Helper on and off.

Potions

Key	What it does
Q, W, E, R	Uses the item registered in the slot.
CTRL + Q, W, E or R	Registers the potion in the slot. Requires the inventory open and the mouse over the potion.

Map and camera

Key	What it does
Arrow keys	Pan the minimap view while it is open.
+ and -	Change the size of the minimap window. Zooming the content is the mouse wheel.
F9	Turns post processing on and off (bloom, fog, color grading).
F10	Locks and unlocks the camera zoom.
F11	Puts the camera back to its default position.
PRINT SCREEN	Turns screen capture on and off.

Chat

Key	What it does
ENTER	Opens the chat box. With the box open, sends the message.
ESC	Closes the chat box.
Up and down arrows	Walks through the history of what you already typed.
F2	Switches between seeing only whispers and seeing every message.
F3	Turns the whisper recipient field on and off.
F4	Fits the chat window size to its content.
F5	Shows and hides the chat frame.
PageUp and PageDown	Scrolls the chat history.
ALT + 1 to 9 and 0	Fires the ten chat macros.

The first character of the message picks the channel: ~ talks to the party, @ talks to the guild and $ talks to your Gens. With no prefix, the message is public. To set the text of a macro, send a slash with the slot number followed by the text in chat.

/1 Let's go to Devias
/2 Need a party

Sets the macros fired by ALT + 1 and ALT + 2.

Party Follow, on CTRL + S

This is a server feature of our own. The party leader holds CTRL + S and the whole group starts following them, actually walking, with map travel when needed. On release, everyone stops and each player's MU Helper turns itself back on. While it is running, a notice shows up on everyone's screen.

Chat commands

A command is any message that starts with a slash. Below are all the commands a regular player can use. Administration commands exist, but they are refused for anyone who is not a GM and are not part of this list.

Command	What it does	Status
/list	Lists the commands available to you.	active
/help <command>	Shows how to use a specific command.	active
/add <str\|agi\|vit\|ene\|cmd> <amount>	Spends stat points in one go, without clicking in the C panel.	active
/move <destination>	Travels to a destination from the Move list. Charges the same zen and asks the same level as the window.	active
/pack	Merges the loose stacks of stackable items in your inventory.	active
/post <message>	Sends a message to the whole server.	active
/offlevel	Disconnects and leaves your character leveling offline with the MU Helper on.	active
/pfollow [on\|off]	Turns on party dragging without having to hold CTRL + S. Only the leader activates it.	active
/muun	Opens the Muun inventory window.	active
/language <code>	Changes the language of the server messages.	active
/war <guild>	Proposes a guild war.	active
/battlesoccer <guild>	Proposes a Battle Soccer match.	active
/addstr, /addagi, /addvit, /addene, /addcmd	Single stat shortcuts for /add.	off today
/resetstats	Gives back all your stat points so you can redistribute them. Requires a safe zone, costs 1,000,000 zen and disconnects you when applied.	depends on the system being on
/resetinfo	Shows the cost and the conditions of the reset.	informational
/reset	Character reset.	will not be used on this server
/clearinv	Empties the inventory for a cost and a confirmation.	off today
/npc <id>	Opens an NPC shop from a distance.	off today
/openware	Opens the vault from a distance.	off today

Client console commands

Besides the commands that go to the server, the client has its own commands that start with a dollar sign and are there for diagnostics. They do not affect your character, only your screen.

$fpscounter on    frame counter and post processing cost
$vsync on|off     vertical sync
$details on|off   technical information on screen

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