The scope box is just making sure that all of the 1/8" plan sheets have the same view extent.
I'm not saying it's adding value, because it isn't. There are just some old guard who say, "You mean Revit CAN'T do something that we automatically do in AutoCAD. Explain to me again why we must move to this more advanced software." In their eyes, if Column line "A" is 3 1/4" from the border on sheet A1.1, it should be 3 1/4" from the border on sheets: E1.1, E2.1, E3.1, M1.1, M2.1, P1.1, S1.1 and S2.1.