Monday and Tuesday my school held department-wide exit exams. All my classes had v serious essays scheduled. I set up a pile of prompt papers on the podium and finished exams on the chair adjacent. I didn't make an announcement about the two piles as to not disturb the silence. I did write "PROMPTS" and "EXAMS" with coordinating arrows on the whiteboard. There are two types of students.
There is the type of student who sees the piles and quietly places the appropriate papers the appropriate places. But the majority of students (like by a lot) shuffled toward me eyes glazed holding out papers like they were babies and I was a doorstep. I would often (trying to keep quiet) point to the piles, and even then many people would look, turn back, "Should I...? Where should I...?" It's pretty obvious. Being empathetic, I could consider the fact that this is an important exam, and everyone wants to be double sure. But being realistic, you can figure it out. You can do it. Do it.