When you are ready to upload your screenshot, you can edit your post above (Edit button is bottom right on your post) and choose to upload it in that post.
Or ...
Use the small reply button on the bottom of that post to create another post and upload it there.
Using the small reply button on the post instead of the big ReplyOP button keeps the branch of the topic threaded properly. -- Join Team Helix * I am praying for these friends .
