So My goal here is to rebuild a donut, so I just want to rebuild a circle as a sweep path for a donut, to have something like that :



Because if I use the existing trimmed one a have more section in the donut, and I want to keep it clean for the boolean I wan't to do later.



Again, it was more a 'surprise' that I can't snap the circle radius after picking the center (in the 3d view), but I fully understand why now, and it's not a problem anyway ;)

Edit:

Maybe you could rename the thread to something like 'snapping question' ... there is no need to have bug alert for nothing :)