Use Tools>Depth Filter to access the Orthogonal View window.
If you are working in 3D, the Orthogonal View is a useful supplement to the standard viewTop-down perspective along the X and Y axes. View displayed in the Tracing window and the Macro View window. because it enables you to view your tracing from the side, along the X,Z axes or the Y,Z axes .
The Depth Filter and the Z Filter are the same thing: they are used to display a specific Z range.