Feature request / Output format select

[dandaka]

Now

I can't select output format. I use PNGs for lossless image storage. But I want them to get converted to JPSs, since I can set quality lower (specially for 2x and 3x sizes) to get better sizes.

Should be

output format in options

[standuprey]

+1
I wonder if there is a way to do that with the customOutput option?

[ArmorDarks]

We need gm.command for this. It should be mapped to options.customCommand option I think