View "By Workplane" = Ctrl+Shift+W or open Customize/ Commands, View/ Camera find the symbol and drag it in to the toolbar where you have the other view's.
And then you can use Shift or Ctrl + Arrows to rotate it correct, deepending of how you want to rotate the view
V18, V19, V20, V21, 2015/ 16/ 17/ 18 Pro. Platinum
Deluxe V20, V21, 2015/ 16/ 17
Windows 10 Home Premium 64 bit, 32 GB
NVIDIA Geforce GTX 780m, 1 GB