Q. I put in the wrong circle size; can I change the size without redrawing them?

A. Yes!  First go to the Utils drop down menu and select Add-Ins, select “Change Circle Size” so that it is checked.

Once this Add-In is turned on, you will find another menu item under the Edit drop down menu.

This window allows you to change circles various ways. Of course, "Selected Circles" will only change the circles you selected. If you select "All Circles of Given Diameter", you will need input the size of the circle you want to change and then put the New Diameter in.

You can also change All circles on a particular layer.