If you want to change the Activity Post Header and or Post Text font sizes. You can check the CSS codes below. 


For Activity Feed Header:


1. Go to BuddyBoss > Theme Options

2. Under Custom Codes, enable CSS

3. Append the following:


.activity-header p { font-size: 18px;}



.activity-header a { font-size: 18px;}

4. Save changes.


Screenshot




For Activity Feed Post Text: 


1. Go to BuddyBoss > Theme Options

2. Under Custom Codes, enable CSS

3. Append the following:


.buddypress-wrap .activity-inner {

font-size: 20px !important;

}

4. Save changes.


Screenshot



Note: Any modifications are considered as custom work already. Know more about our Support policy here: https://www.buddyboss.com/support-policy/