| Option Category | # # CORE RENDER OPTIONS # |
| Description | This option tells MAME to display a system using it's original screen aspect ratio. This option works in fullscreen or windowed mode. |
| Full Command | -keepaspect |
| Alt. Command | -ka |
| Reverse Command | -nokeepaspect |
| Example | mame64.exe pacman -nokeepaspect |
| mame.ini Command | keepaspect |
| Command Default | 1 |
| Argument Format | <boolean> |