wip post.
Add border to screenshots to avoid confusion with text screenshots.
Expanding post, adding screenshots.
Improving screenshots to only show point when necessary.
Expanding post, better headings, more screenshots.
More screenshots, slight wording expansion.
Expansion, more screenshots!
More text, a few more screenshots.
A few more screenshots still!
More screenshots, correcting some paths.
More images, polishing text.
Finishing text, final screenshots.
Styling image captions.
Tweaking background color in Pharo screenshot.