# Display preferences

## Rendering styles

Rendering styles smooth out jagged pixels or apply retro effects to the game graphics. You can choose styles in the Display Preferences panel or from the View ▸ Rendering Style menu.

Smoothing styles work best on low-resolution 2D games. For performance reasons, rendering styles aren’t applied to games in high-resolution (640×480+) modes.

## Full Screen mode

Make the game window fill the whole screen by clicking the View ▸ Enter Full Screen menu item or by pressing `Cmd ⌘`+`F`.

While in full screen, pressing `Cmd ⌘`+`F` will switch back to windowed mode. You can also `Cmd ⌘`+`click` in full screen to access the menu bar and the Dock.

If you always want to play games in full screen, enable Start up games in Full Screen mode in the Display Preferences panel. Note that Boxer will not automatically switch to full screen mode if the program panel is visible.

## Aspect ratio correction

DOS games were originally designed for display on 4:3 CRT displays, which would stretch the video signal to fill the whole screen. For modes like 320×200, this meant that pixels would be taller rather than truly square.

By default, Boxer stretches games to their originally-intended ratio. If you prefer sharp square pixels, then disable Always use 4:3 aspect ratio in the Display Preferences panel.

You can also toggle this setting with the View ▸ Use 4:3 Aspect Ratio menu item.