Push the switch back only to the first detent , if you push it gently you will feel an initial resistance point which will only open the shade . Same with closing, you push close gently to the first resistance point it will close the glass bit not the shade.
Ok so you’re not missing your manual. That’s good cuz there’s a lot of good info in them. Are you really sure you’re missing something? Have you checked under the hatch for your jack, spare tire, maybe your tow hook is missing. It’s probably all there.