# Display preferences

## Rendering styles

Rendering styles smooth out jagged pixels or apply retro effects to the game graphics. You can pick a style 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

To make the game window fill the whole screen, use the View ▸ Enter Full Screen menu item or press `Cmd ⌘`+`F`. Pressing it again will switch back to windowed mode.

While in full screen mode, you can `Cmd ⌘`+`click` 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.

## 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 square pixels, then uncheck “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.