-2   Desktop resolution        16   1280x800
-1   Custom resolution         17   1280x1024
0    320x240                   18   1440x900
1    400x300                   19   1600x900
2    512x385                   20   1600x1000
3    640x360                   21   1680x1050
4    640x400                   22   1600x1200
5    640x480                   23   1920x1080
6    800x450                   24   1920x1200
7    852x480                   25   1920x1440
8    800x500                   26   2048x1536
9    800x600                   27   2560x1600
10   1024x640
11   1024x576
12   1024x768
13   1152x864
14   1280x720
15   1280x768

r_aspectratio  - aspect ratio setting
r_customheight - custom height (ie: 1080 in 1920x1080)
r_customwidth  - custom width (ie: 1920 in 1920x1080)

seta r_mode "-1"
seta r_customwidth "2560"
seta r_customheight "1440"