Quick menu

It can be used to open Map, Paperdoll, Backpack, Journal, Chat Window and Help Menu. Left clicking then holding the mouse over the menu (as opposed to the buttons on the menu) allows you to "drag" it around the screen by moving the cursor - release when you've got it where you want it. Most other displays in the game can likewise be dragged (allowing you to customize the interface to your choosing). Usually displays can be closed by right clicking them.
Paperdoll

The Paperdoll is one of the most important and commonly used menu in the game. You use it to change your character clothing and equipment, access your backpack, and you can also access other important menus.
Backpack

The Backpack serves as the primary storage for individual characters. The Backpack is always displayed in the Paperdoll. To open the Backpack, click it in the Player Quick Menu or the Paperdoll window or use the default keyboard command, Alt + I. If you have the Paperdoll and Backpack open, you can equip/unequip your character by dragging items from one display to the other. Likewise, many items in the game world can be picked up by dragging them into your pack.
