Papers can be held my moderators, but as an author when you post you don't have the ability to hold or hide your paper. Postings go up once a day as a batch, s

Papers can be held my moderators, but as an author when you post you don't have the ability to hold or hide your paper. Postings go up once a day as a batch, so you could wait 24ish hours to see your paper appear, longer if your posting is just before the weekend.