1. Select 
Groups
2. Select the group you would like to share a photo in
3. Select the text field box that reads Share a Post to this group
4. Select the photo icon 
and upload your photo
1. Tap 
Communities
2. Select the group you would like to share a photo in
3. Tap 
4. Tap the photo icon and upload your photo
1. Tap Communities
2. Select the group you would like to share a photo in
3. Tap
4. Tap the photo icon and upload your photo