How to trash an entire thread?
Swipe the to the left. Here you will have a trash option marked in red.
If Quick Swipe is turned on
Swipe from the right side of the screen to the left side and the green Archive will turn into red Trash that will delete the entire thread.
- Hover over the thread you wish to delete or right click it.
- If you hover over it, click the three dots that appears to open the action menu.
- A number of useful features will appear.
- Click on the trash icon to delete the message.