problem about snapping points in hole wizard

hi,
while working with hole wizard we must select the face firstinorder to get the 2D sketch.
while i select the face,  where i click that pointbecomes myfirst hole center there after i will proceed for anotherpositionsin wizard window.
in this case after placing holes i have to go forconstraining the first hole position again.

so my problem is about how can i get it constrained (forexample:concentric to something) just by selecting point on face.so as notrequired to go back again.

thanks.
SolidworksParts And Features