| Option Category | # # OSD PER-WINDOW VIDEO OPTIONS # |
| Description | This option can be used in conjunction with the -screen command and allows you to choose the aspect ratio that the screen will be shown in. If you leave it on auto then MAME will try and use the correct ratio for the system. The available aspect ratios are available in "Video Options" on the UI menu. Using just -aspect without a following number will affect all the generated screens. |
| Full Command | -aspect <integer> <ratio> |
| Alt. Command | aspect0 |
| Reverse Command | none |
| Example | mame64 darius2d -numscreens 2 -aspect2 40:29 -window (Will show the second window in the original games screen ratio) |
| mame.ini Command | aspect |
| Command Default | auto |
| Argument Format | <integer> <ratio> |