These filters, which Gmail first introduced in September as a useful method to further hone search results on Android, are now visible while examining labels.
In Gmail for Android, opening a label or default folder (such as Starred or Sent) exposes a carousel below the search box. These filters begin by noting the label you are currently viewing and offer the option to add more, but doing so sends you to the search interface rather than merely allowing you to view a label.
Following this information is: From, To, Attachment, Date. Updates the Exclusive calendar and is unread. They are the same ones that show up in Gmail search results, where the label filter is now displayed first (on Android).
Filters can be hidden from the top-right menu, but this setting is not permanent and will reappear if you change labels.
When Gmail search fails, the carousel is a really helpful function that makes discovering emails by filters lot simpler. It was released alongside Gmail’s broad rollout last week on Android. At this time, we are not seeing it in the iOS app.
The carousel can also be seen online while viewing labels or folders. The label filter does not appear in the first place like on mobile; we are unsure of when it became available outside of the search UI (or in Advanced search, though you can manually add label: in the bar).