When using WindowCoverings in Alexa, the App shows just information, no controls (see below left). This is a serious limitation, since you can not use it to open or close the curtain. And you can not use it in an automation.

That's why we decided to show it a Switch (see below right). This would normally mean you would use turn on/off.

But we made it so that you can still say:

• Alexa, open the curtain
• Alexa, close the curtain
• Alexa, set the curtain to 35%
• Alexa, raise the curtain
• Alexa, lower the curtain