| Option Category | # # CORE SCREEN OPTIONS # |
| Description | Brightness affects how bright MAME will display the system selected. It affects all colours, black and white too. Brightness will affect all parts of the screen including artwork. You can use values from 0.1 up to 2.0. Values under 1.0 will darken the image and vice-versa. |
| Full Command | -brightness <float> |
| Alt. Command | none |
| Reverse Command | none |
| Example | mame64.exe pacman -brightness 0.75 |
| mame.ini Command | brightness |
| Command Default | 1.0 |
| Argument Format | <float> |