Marty I use ancient software from MS: Photodraw.
It can set transparency from 0 - 100% on the selected object.
I imagine most imaging software can do this?
Here's my R vs S desk:

I try to eyeball the screenshot as best I can, then paste it next to the reference photo.
Usually by the 3rd attempt they correspond reasonably in terms of perspective.

Then making the screenshot a little transparent, it can be slid over the photo and resized and finally checked.
Maybe one more iteration and it's done: Make it opaque and set up the double picture.
Often you need to imagine where the photographer was standing.
In this case it was on the roof of an adjacent building.
Instead of just going there in the sim, I fiddled with the camera position, and got it wrong.
Often impatience wins out over accuracy...