Clear or select the checkbox next to the name of the coordinate system.
To set the active coordinate system
Right-click the coordinate system you want to make active.This can be done from either the Markups tab or the 3D scene.
From the coordinate system context menu, select Active Coordinate System.
Note
A dimension markup takes its measurement with respect to the coordinate system that is active at the time the markup is created. When the active coordinate system changes, the dimension label will not change---it will still display the measurement with respect to the coordinate system that was active when the dimension was created.
