I'm interested in setting up my priority inbox with 5-6 sections, but Gmail settings limit you to 4. I've found this alleged settings hack to add additional priority inbox sections; however, I cannot get this to work.
If you inspect “Remove Section,” and change the corresponding act=”z” snippet to act=”n” (highlighted in the image below) and then click “Remove Section,” this will add another new section!
There doesn’t seem to be a cap on the number of sections you can
create through this technique, and these changes will persist for
future browser sessions just like the Unread trick.
I'm not sure if this still works, or if the snippet needs to be updated based on some Gmail updates.
Best Answer
This is feature is not currently available. You can suggest new features (and vote for the most common suggestions) here: http://mail.google.com/support/bin/request.py?contact_type=suggest (perhaps using the "I have another idea" option at the bottom)
Source: https://productforums.google.com/forum/#!topic/gmail/fbzQMggCzzw