Once you’ve done that, the stars will rotate with each consecutive click on the star icon.
Labels are a great way of organizing your email; nested labels give you the ability to organize labels hierarchically. Starting today, nested labels are enabled for everyone along with a couple of small improvements such as a sticky collapse/expand state and better editing options.
To start using them, you can either create a new sub-label from the dropdown menu on the left hand side or just move an existing label under another one using the edit option:
Advanced IMAP Controls
This Labs feature provided a very useful set of advanced controls for those of you who access Gmail through IMAP clients (e.g. Outlook, Thunderbird, or your iPhone’s native mail app). Now it’s easier to take advantage of features like syncing only selected labels or limiting the folder size limit to improve your IMAP experience.
True to the original spirit of Gmail Labs, we’ll continue to add new features, graduate some, and retire others, so keep trying them out and sending us your feedback and follow us on twitter.