MacVim: how do I set a left gutter (margin) for my buffers?

Question

In MacVim the text that I\'m editing in all buffers is jammed up hard against the left hand side of the buffer. I find this quite visually jarring, especially if I\'m looking at

Answer 1

I use line numbering for that reason (:set number). But if you want a margin without the numbers, use:

:set foldcolumn=

Example:

:set foldcolumn=3