The 'short' video below is a house window shade, but it's the same technique.
If you have day/night shades, it will be 2-toned (light & dark) fabric, like the video. If you have night shades it will be 'only' the dark fabric.
Unlike the lady in the video (who only uses one hand in the center), you'll probably need to use 2 hands on your RV blinds & even pressure
(near the outer edge of both sides at the same). 'Push' blinds up to open, & pull down to close. As others have said, the window 'knob/crank'
may get in the way depending on each window design - gently pull the blind out/over the 'knob/crank' first.
Hope this helps.
Terri, the Chevy co-pilot