Click this

Enter the camera mode (like you take a picture with the camera in reality), adjust the angle of view you want, adjusted, if you still want to edit the scene you, you can click the button above again, (this time quite fixed the camera there), that's it, if you want to view in the right view or the left view (to adjust the position of the camera) you can adjust the projection mode in the properties of the camera. If you want to adjust the position of the camera in the right or left view (to precisely adjust the position of the camera) you can adjust the projection mode in the properties of the camera, and the last point is to have the rendering before you click, and after that in the rendering of the la