If you've created a post, and there's something you would like to change, you have 30 minutes to make an edit. On the post you've just created, you will see the option to 'Edit' in the bottom menu on the left hand side: When you click 'Edit' a pop-up window will appear with the text editor box: You can then make the edit and click 'Save Changes'. If you want other members to know you have changed something, you can put 'EDIT:' at the beginning. Your post will be updated immediately. If you have posted personal information, such as an email address or phone number, and more than 120 seconds have passed, you can ask a moderator to edit the post by reporting it. Click the 'Report' button in the bottom menu on the left hand side.