1. Navigate to Core> Settings> News Settings> Recent Activity
2. Decide which content gets published to Recent Activity. You can click "Add More" button for each content type to add in the content that will be published to the Recent Activity.
3. To remove content, click the red "-" button on the far right of that content.
4. If you'd like Recent Activity to show who published the content, set the Yes/No button at the top of the screen to say Yes.

Note: Once Recent Activity is turned on, content will only publish moving forward. It will not add in previous posts in that category or group, even if they are active. If you want those items to post, you can edit the item and choose a publish date after Recent Activity was activated.