Your comments

I see. Probably I always got short enough file names. Thank you Jon. Using moment would like to point you to this request. Thank you and good luck with Sublime.
Thing is that in sublime text 1 you can resize minimap and make it bigger, so text highlights are also more noticeable. So it is better to ask for ability to set width of minimap - so please vote here.
Please check existing posts before posting.
Have you reloaded sublime after that?