Didn't manage to do it with the documentation - UTF8

Hello. Firebug tells me "line 100" but every time the line is a bit different (say 70 or 130). I understand that this happens because the encoding wasn't set... How do I set the programs encoding to UTF-8? I've tried to followed the documentation but with no success... Thank you for your help, Ben.

Sorry, but I have no idea what you mean. Are you talking about encoding of a file edited with WinSCP?