Here is one of the easiest ways to change the amount of activity stream posts per page in the default BuddyPress theme.
1. FTP to – example.com/wp-content/plugins/buddypress/bp-activity/ – in your WP directory
2. Open – bp-activity-templatetags.php – in your text editor
3. Ctrl + F – then enter – ‘per_page’
4. Just change the value following – ‘per_page’ =>
