I have a large schedule, but want to be able to filter to only the tasks that are predecessors and successors of a specific task I'm focused on.

The filtered tasks are not necessarily on the critical path.

I'd like to be able to do this in the Network Diagram and Gantt Chart views.

I have a large schedule, but in the Network Diagram view, I want to be able to filter to only show the tasks that are linked to the specific task I'm focused on. The filtered tasks are not necessarily on the critical path.

This would also be useful in the Gantt Chart view.

Update: I clarified that I want to filter my project to only show the entire string of predecessor and successors that go through an arbitrary task. Not just its immediate predecessors and successors, which is easily accomplished with the Relationship Diagram or Task Entry view.

The Task Path command is not useful because I don't want the related tasks highlighted, I want the non-related tasks hidden. The entire point is that I want to be able to suppress the information that's not interesting so I can fit more of the logic going through a particular activity on the screen (or printed page) at once.