Confusing UI

20190325_155353

From a hotel I stayed at a couple weeks ago. On its left is a window with a shade. On its right is another window with a shade.

If you want to raise the right set (shade and window), how would you do it?
If you want to lower the shades on the left, but only halfway, how would you do that?
Should the stopping of raising or lowering require a separate button push?