How do I view the boundary area of my camera?

Sand3

So on older versions of DS, when you set a specific render size/ratio, that ratio would show up on your stage view and the stuff that didn't fit inside the render area would be sort of darkened outside of the box. I'm trying to find some setting in DS4.6 that will make a box show up on my screen that shows me the boundaries of my render so that I don't have to keep just guessing. I don't see anything in the render-settings tab, and DS doesn't have a view menu, I guess, so I'm not sure where to look.

Jaderail

The Viewport mini menu (four lines) and Show Aspect frame ticked on.

Sand3

Ah! Thank you!