Forum Settings - Columns

Moodle Docs 

Name of the column Can be filtered? Where can I see it on the UI? Comment
1. Forum name
2. Forum type
3. Due date
4. Cut-off date
5. Maximum number of attachments
6. Maximum attachment size
7. Display word count
8. Subscription mode
9. Read tracking
10. RSS feed for this activity If RSS feeds are enabled for the site and for forums, then an expandable section for RSS settings will appear. 
Site administration > General > Advanced features > Enable RSS feeds
Site administration > Plugins > Activity modules > Forum > Enable RSS feeds
11. Number of RSS recent articles
12. Lock discussions after period of inactivity
13. Time period for blocking
14. Post threshold for blocking
15. Post threshold for warning
16. Default setting for "Notify students"  'Whole forum grading' and 'Ratings' produce two separate grade items in the grade book. You can see their settings under the Grade Item Settings entity.
17. Aggregate type
18. Rating from
19. Rating until
20. Start discussions or post replies  Activity specific completion conditions are always within the activity entity. Common conditions (i.e. 'Students must manually mark the activity as done' or 'View the activity') are under the Course Module Settings.
21. Start discussions
22. Post replies
23. Last modified Not available on the front end