- Locate the message/file you want to remove.
- Hover your marker (arrow) over the message/file and click on the three dots that appears on the right '...'
- Click on Remove.
- Click remove in the popup window. This will permanently delete the message so be careful about what you delete
If you want to be an Admin you have to ask another admin in that room. For a guide on how to give someone admin in a room look here
Remove messages files