You will have to edit a template.
Not sure I follow so I’ll reply in two ways:
1: If you have 5 prizes then 5 different winners will be obviously chosen.
2: If you have 5 prizes then wants to pick only 1 and leave 4 there, NO. It isn’t an option and it won’t be. The raffle has a expire date and all winners are picked in that date; not before, not after.