When you work with linked project files a common issue people deal with is controlling the display of the linked levels and grids. The first person I recall discovering the technique I'm about to describe is Daniel Stine, the author of several Revit books.
If your project and the other project files use specific worksets for certain elements, like Levels and/or grids you can control their visibility quite easily. Here's the steps:
- For each linked project file - define a workset(s) name for the linked elements
- Have the source of each file make sure the elements are assigned to this workset(s)
- Create the same workset(s) using the same name in your own project
- Un-Check Visible by default in all views
When you import the other project file Revit will recognize the workset that uses the same name and respect the fact that your workset by the same name isn't supposed to be visible, rendering their workset "invisible" too. I've created a brief video that explains this too.
For the purist that prefers to use Filters for visibility control, Revit doesn't provide access to project file parameters like file name or project name. If Revit did then we could filter for the grids in the other file instead. If the grid family name chosen by the other project file creators was carefully assigned/selected we could control it with Filters.