Control Point Curve Tool Doesn't Create Curves -- Acts Like Polyline

I’m using Rhino 6 for Mac, and whenever I use the Control Point Curve tool all I get are straight lines, akin to the polyline. Can someone help me get curved lines back? Thanks in advance!

Is your degree set to 1?

Yes-- what should I set it to?

At least 3 for a smooth curve.

Thank you so much!