# letterbox parameter (skin)

Source: https://ref.dm-lang.org/skin/param/letterbox
Added in BYOND 500.

### Applies to
> [Map](https://ref.dm-lang.org/skin/control/map.md)

### Format
> `true/false`

### Default value
> `true`

If map auto-scales its icons ([zoom](https://ref.dm-lang.org/skin/param/zoom.md) is 0), make sure the entire map fits, and fill excess space with the background color.

If `letterbox` is not enabled, auto-zoom will fill all available space, and any excess will be cut off.

### See also
- [view-size parameter](https://ref.dm-lang.org/skin/param/view-size.md)
- [zoom parameter](https://ref.dm-lang.org/skin/param/zoom.md)
- [zoom-mode parameter](https://ref.dm-lang.org/skin/param/zoom-mode.md)