ID:161908
 
In the default .dmi file it sets it to 32x32 iv heard you can increase that. I can't figure out how though I need my tiles to be 64x64. can somone tell me how to change the default. or is it even possible with this new version o byond.
You can't literally increase the icon size, but you can make it appear bigger. As of how, I don't know. Figured I'd at least inform you of one thing.
In response to Siientxx
You can make your icons take up more than 32x32 with icon.size.
Check at the top right corner of the icon for two input boxes.
If you want to actually edit the icons though, your going to have to use an external progrmam like Paint.

If you want them simply to appear bigger, you could either set the map.icon-size to something greater than 32x32, or use Scale()