It's not likely you will find a way to produce a good .pdf from a
fuzzy screen shot. Is it the jazz chart or the basic chord chart
that is wanted? A little confusing. The chart I am seeing is way
to long to print screen. It would have to be edited, and the quality
is just not there.
You should be able to find a chord chart download somewhere.
Is there a reason you don't buy one from a music store?
The cheapest and best way to produce .pdf from screen graphics
is a combination of a good screen capture program such as Snipping
Tool (Built into Windows) a graphic editor such as MS Paint,
a free desktop publisher named "Scribus," and a decent .pdf handler
such as Fusion.
(Fusion may cost a few dollars, but worth it.)
http://www.techsupportalert.com/best-free-screen-capture-tool.htmDon't expect to learn this overnight, but know, the process of
creating your own .pdf from available tools opens up the world of
desktop publishing, kissing word processing good bye.