Shortkey for endpoint objectsnap?

 From:  LIA3
1304.1 
Hi all,
Sorry but I donĀ“t understand English very well.

I use this script:
Toggle object snap on or off:
script:moi.drawingAids.objectSnap = !moi.drawingAids.objectSnap;


but Which is Shortkey for this objectsnap? (Directly)

End
Mid
On
Intersection
Center


Thanks a lot,
LIA