On 9 Aug 2016, at 1:56, Lewis Overton wrote:

TM2 does a nice job of formatting Github markdown, and places it in a new
window. Unfortunately, I have yet to figure out how to print or export the
contents of the formatted window. Is this a bug in TM2 or in my head?

A little known secret is that all the (HTML) output windows support ⌘P to bring up the Print dialog.

Unfortunately 10.10 or maybe 10.11 introduced a bug in WebKit so that it is very prone to crashing (when it generates a PDF from our HTML), I fixed this locally by commenting out the position fixed; from the CSS and then forgot about it.

We’ll update the CSS shortly to workaround this issue.

Jacob already mentioned you can use View Source with the (HTML) output windows, though the Markdown bundle also has a Convert to HTML action if you just want the HTML created from the Markdown (without TextMate’s boilerplate).