Save this camera view. Restore the previously-saved camera view. Toggle between orthographic and perspective viewing modes. In perspective, objects appear to get smaller as they recede and parallel lines receding in the distance appear to eventually meet. In orthographic, they don't.
Perspective looks more realistic.
Orthographic is good for checking alignment. IronCAD refers to this primitive as an Intellishape . The first time you click somewhere on the model, IronCAD selects the whole thing. You can then grab the dots and change the size and location of this primitive. The next time you click, IronCAD selects just the point, edge, or face you are pointing to.