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### 2.8 User interface

#### 2.8.1 A reduced set of keys

Liquid War 6 can be controlled using a reduced set of keys. This is to make the game more portable and allow possible ports to platforms where a full keyboard is not available. Depending on the graphics backend, exact mapping might change, they should be obvious and intuitive.

Those keys are:

- `up` : the arrow up key
- `down` : the down arrow key
- `left` : the left arrow key
- `right` : the right arrow key
- `enter` : the enter / return key
- `esc` : the escape key
- `pgup` : the page up key
- `pgdown` : the page down key

#### 2.8.2 Combining mouse, keyboard and joysticks

It's also possible to control the game with the mouse only, or with a joystick. By default the interface will trap all events and respond on any of these possible devices.

The mouse follows these rules:

- mouse left-click is equivalent to the keyboard `enter`, it validates an item
- mouse right-click is equivalent to the keyboard `esc`, it goes back, cancels, ...
- mouse wheel-up is equivalent to the keyboard `pgup`
- mouse wheel-down is equivalent to the keyboard `pgdown`

The joytick bindings is done as follows:

- button `A` is equivalent to the keyboard `enter`, it validates an item
- button `B` is equivalent to the keyboard `esc`, it goes back, cancels, ...
- button `C` is equivalent to the keyboard `pgup`
- button `D` is equivalent to the keyboard `pgdown`

What these buttons are exactly on your joystick depends on your hardware and driver. Note that Liquid War 6 converts any analog joystick input to a digital pad-like information.

#### 2.8.3 Quit with F10

There's also an (almost) hardcoded shortcut which will quit the game immediately, or at least as quickly as possible, without any prompt or warning.

It is the `F10` key.

Think of this feature as the procastinator's “whoops, here comes my boss!!!” emergency function.