Guide

1. Navigate to the top navigation bar, then click the 'Explore More Dropbox Apps' icon.

2. Scroll down to the bottom and click 'App Center'.

3. After that, search for 'Gmail' and select it from the suggested results.

4. Finally, click 'Connect' to proceed.

5. After completing these steps, your Dropbox account will be integrated instantly with Gmail. Tap 'Done' afterwards to return to the homepage and finally use the newly connected apps together.