2.2.1 release note (7/2):

1. Library documents list add "Group by Categories". Right click - Group by Categories.
2. External mode add show .Rmd, .mkdn, .mdwn, .mdtxt, .mdtext and .taskpaper files.
3. Now you can change the LaTeX (Mathjax) Preview font. Please open Preferences - Themes to change. you can choose TeX, STIX-Web, Asana-Math, Neo-Euler, Gyre-Pagella, Gyre-Termes and Latin-Modern
4. Add publish to Tumblr.
5. Add Preview style: mweb-solarized-dark, mweb-solarized-light, mweb-Tomorrow Blue, mweb-Tomorrow.
6. Add disable left right swipe gesture (Preferences - General).
7. When you disable "Make links clickable in Editor view", you can hold the Command key to click the link in Editor.
8. Other bug fixes and performance improvements.

2.2.2 release note (7/8):

1. Library: New way to set/edit the document categories and tags. Just click the top of Editor "categories and tags" bar, or use shortcuts: CMD + 8.
2. Library: Document Outline, Media & Attachment, Website Extension in one panel now. Just click "Document Outline" button or shortcuts: CMD + 7.
3. Add overlay option in "Document Outline".
4. Other bug fixes and performance improvements.