Account Switching Gesture
The account switching gesture makes it much simpler and smoother to switch between Gmail accounts. All you need to do is just slide up or down the account profile icon in the top corner instead of opening the menu and choosing the other account. Unlike Google Drive, Gmail has no animation of the same sliding cards, However, it is the same as Contacts. The static interface items are still there but your profile picture and mail are dim. Also, there is no option for every account’s inbox, so you will still have to get to it manually.
Dark Theme
Google has been testing dark mode to a variety of its applications, but Gmail still has not got it yet. Now Gmail version 2019.08.18 has a few indications of a future dark theme. As per screengrabs shared by Android Police, the widget and screen match with Android Q’s systemwide dark theme, but the primary interface still remains white. Although you will have to force close the app and clear cache to see it. The Gmail v2019.08.18 update is currently not available for all, but you can download the already available APK if you’re not that patient. So before it comes on the Play Store, you can download it from APK Mirror and use these new Gmail features.