Create a coincident reference plane

When you create a new reference plane based on an existing reference plane, the x-axis orientation of the new reference plane matches the x-axis orientation of the existing reference plane.

When you create a new reference plane based on a planar face on the model, you can use the N, B, T, F, and P hot keys on the keyboard to define the orientation of the x-axis. The N key selects the next linear edge as the x-axis. The B key goes back to the previously selected edge. The T key toggles the x-axis origin to the opposite end of the selected edge. The P key selects a base reference plane to define the x-axis. The F key flips the normal direction of the reference plane, which changes the x-axis orientation.

You can use the steering wheel to move the reference plane to another location.

In an assembly document, this command is on the Sketching tab in the Reference group.