Here's how to edit or delete a comment that you've made on a post. Please note: you cannot edit or delete the comments of other users.
1. Find the comment you want to edit first by clicking on the post.
2. Locate the comment you wish to edit or delete from the Activity Timeline.
3. Select Edit or Delete from below the comment you wish to alter.
3. After selecting Edit, type your additional comments or edits in the comment box.
4. When complete, select Save Changes.
5. To remove your comment, select Delete and confirm in the confirmation window.