How do you open a slingshot?

Excuse me, but could you please clarify something for me? I'm a bit confused about how one would actually open a slingshot. I understand it's a simple tool typically used for recreational purposes or even hunting in some cases, but I'm not entirely sure of the mechanics behind it. Specifically, what steps do you take to "open" a slingshot, and is there a specific way to prepare it for use? Any insight you could provide would be greatly appreciated.