Steps I took that resulted in the problem:
You can’t put a hole or via ON a track with the front and back options on a single sides PCB, so that they aren’t hidden by the track.
Start new and go to PCB.
Changed PCB to single sided
Put 2 headers on a PCB.
Link wire between both.
Changed wire to 70mil and moved it back.
Add hole and move to front.
Moved hole over track and it goes behind the track.
What I expected should have happened instead:
I would like to see where holes and vias are.
My version of Fritzing and my operating system:
Win7 64 SP1
Please also attach any files that help explaining this problem