Is there any chance the 3D Viewer will get "Perspective View Mode" back?

Follow the below mentioned steps

  1. Step 1:

    Go to camera tab, be make sure Orthographic mode is not cheked

  2. Step 2:

    If so, Check on Perspective option

  3. Step 3:

    Later adjust the perspective as per your requirement ...By sliding the perspective bar, as shown in the figure...

    0 means full perspective........200 means orthographic
    A value ranging between 30-40 on perspective slider bar will give best result.