Admins can upload or change cover photos for their group. To set a cover photo, log into Facebook on your computer.
Follow the steps below to upload a cover photo:
See: How to Invite New Members to a Group
1. From your News Feed tap Main Menu then tap Groups and select your group.
2. Tap the three dots, More then select View Group Info.
3. Tap Add Cover Photo or Change Cover Photo.
4. Tap Choose Photo.
5. Tap Take Photo or Browse.
Keep in mind that the recommended size for group cover photos is 1,640px by 856px (or 1.91:1 ratio).
Note: If the cover photo has never been set, group members may also be able to add a cover photo. If a group member sets the cover photo for a group, and later decides they’d like to remove it, they’ll need to delete the photo to remove it as the group cover photo.