Don’t think positioning of the vDos window is actually used much, default centering will mostly do.
Spaces are allowed (discarded), so what’s wrong with: rem The default vDos window is centered and will cover about (max) 75% of the screen. rem This can be changed by WINDOW = [-][max percentage][,left-x-pos:top-y-pos] rem In text mode, the window has some extra blank space to the left and right, the minus sign will disable this.
Or specific in: window = 50, 300: 100
Can you give an example of config.txt directives needing corrections? And mind, the more you comment, the less users will actually read