An incoming call will display as a toast notification in the bottom-right of your screen. To answer the incoming call, click the Answer button

 

This will create an active call window:

 

If you select another application, the call window will get smaller but still remain on top, similar to when you're in a Zoom or Teams meeting

 

 

 

You can further decrease the size of the call window by clicking the carat 
 icon

 

   

To end the call, simply click the red x 
 button