When portrait photos are uploaded to the feed the preview does not fill the whole Activity Post area. See the sample screenshot below:
You can use the following CSS code to change the layout. Please follow the steps below:
1. Go to BuddyBoss – Theme Options
2. Under Custom Codes, enable CSS
3. Append the following:
.media-activity .bb-open-media-theatre img {
width: 543px !important;
height: 543px !important;
}
4. Save changes.
Result: