Welcome to the forum.
Can you provide some screen shots of this?
This command changed a bit in 2010. It now has the dialog
opening up in the property manager and wont close until you
are finish selecting entities and hit the green check mark.
Are you seeing the command in your sketch toolbar and the
dialog in the property manager is not appearing?
See if this thread addresses anything you are experiancing as well.
Thanks for your prompt response and thanks for the lead to that thread. It answered the question I had. The mistake I was making was not starting a sketch right after selecting the reference plane. Learning how to do this is a great relief. I’ll have another question coming at the forum when I can phrase it properly.
Love this software.
I used to do that very same thing when I first started using it.
Easy to do. I am glad you figured this out.