I am creating a new testpoint symbol. Simply a pad with a silk screen circle around it. When I draw the circle (Add/Circle on pkg geo/silk top) I can not resize it once I end the circle command. I have tried edit/change, edit/vertex; edit/delete vertex, etc...... The only way I can find to change it is to delete it and draw it again. I have found the same thing to be very cumbersome when trying to edit the silk or assy outline in pkg/geo. Sometimes edit/vertex works, sometimes it doesn't.
I am using general edit mode and have selected the correct filters.
One of the new features added to the 16.6 release is the ability to change the radius of an instantiated line drawn circle. You hover over a circle then use the RMB to access the 'Change Radius' command when in the General Edit App mode.
16.6 updates for Allegro PCB Editor can be fouind at the following location