The feature that I’m suggesting here is one that I’ve seen in apps like Handy Art Reference Tool and programs like Clip Studio Modeler. It is the ability to adjust the camera angle on the Z-axis, which tilts the camera angle clockwise or counterclockwise. Only the Z-axis is affected, while other axis are unaffected. This way we can precisely change the camera angle without changing anything else. The 3D scene will remain the same. The only thing changing is the camera angle, which is tilted on a single axis.
Here are some images that depict the feature that I am explaining:
