@Kordelia I think what they mean is the description field. I've seen people do that before, where they might show a completed work, then in the description show screenshots of it in progress or alternative versions. Another option is to just make multiple uploads and link to other versions in the description for those interested.
Shadowriter
Welcome aboard! You'll find a lot more freedom here than you're used to. As for 'accessing your comments' I'm not sure what you mean.
Kordelia
Thank you! Freedom sounds GREAT! About the comments: It said to post other versions in your own comment section rather than creating a new post. But I can't find a comment-button under my own posts.