Mainly I mean syntax highlighting (for exotic language), but not only. Even transfer of the color scheme can be useful. It will allow to work in a habitual situation right now, without control of a new environment. I very much like theme "Hot Frudge Sundae" in Notepad++, for example. I liked Sublime Text, but I can't migrate to it because I need make break in work for this purpose.
Kundesupport af UserEcho