To "square-up " the part to the screen,
From the Graphics Modes toolbar, select the 3D Rotate Mode icon
Right-click on a CAD element. PC-DMIS rotates the drawing and makes the selected feature parallel to the closest screen axis (vertical, horizontal, or perpendicular to the screen).
You can square-up the drawing to the closest X, Y, or Z axis at any time, even if you don't have the Rotate dialog box open. Click twice on the Graphic Display window with your mouse wheel button.