Inside Camera Zoom allows you to zoom the camera in and out while inside a vehicle using your mouse scroll wheel, just like you would on an outside camera. Looking at that distant corner of the field, or at that small gauge on the dashboard, is now only a scroll away. Clicking the middle mouse button will reset the zoom level (Field of View) back to default.
The ‘Reset Vehicle Camera’ game setting, if enabled, also resets the view back to default when you switch vehicles.
Modification known from FS19 by spinning the mouse wheel we can zoom in or out the camera view inside the vehicles. When you press the right mouse button and scroll wheel, the camera returns to its default location. It happens to work without problems according to the previous version of the game.