Controls

You can see this list in the game under Esc → Controls.

Mouse

Action	What it does
Left click	Walk, attack, talk to an NPC, pick up an item
Hold left click	Keep walking towards the cursor
Right click	Cast the active skill. Held, it repeats
Drag an item into the world	Drop it on the ground
Wheel	Zoom the camera in or out

Keyboard

Key	What it does
`1` … `0`	Use the skill or potion in that bar slot
`C`	Character: attributes, spending points and reset
`I` or `V`	Inventory
`K`	Skills: details and assigning to the bar
`Z`	MU Helper window
`Home`	Start or stop the MU Helper
`M`	Travel to another map
`Tab`	Minimap (click on it to walk there)
`G`	Guild
`T`	Active quests
`A`	Master tree
`O`	Options
`Space`	Pick up the nearest item
`Enter`	Type in the chat (`Tab` changes the channel while typing)
`Esc`	Close the top window; if none, drop the target; if none, open the menu
`F2`	Free camera

Inventory

Double click an item: equip it, drink it, learn it or open it.
Drag: move items; dropping a jewel on an item upgrades it.
Right click: the item menu (lock, drop, open on the ground…).

Touch mode

Under O → Interface layout you can pick Touch: big skill buttons at the bottom right and a folded menu. Mouse and finger work in both layouts.