Default fonts too small in gitk on OS X when installed with MacPorts

This is an easy one, addressed obliquely by the blog post that is the number one result in Google. The blogger also sets his font to Arial, which no one should emulate.

Gitk works pretty much straight out of MacPorts. Bravo, except for the 9 point fonts. Really.

Launch X11 and cd to your git repository in xterm. Run gitk and marvel at the unreadable text.

Edit the top three lines of ~/.gitk to change the fonts and/or sizes. Mine looks like this:

set mainfont {Helvetica 12}
set textfont {Courier 12}
set uifont {Helvetica 12 bold}
set tabstop 8

All this assumes that your X11 profile has a usable $PATH.