1) I create a sketch for a cut and place an infinite vertical centerline in it.
2) I "snap" the centerline to a datum plane.
3) If I grab the centerline, it lets me drag it away from the plane.
If the centerline "snapped" to the datum plane, why isn't it constrained to it? I don't want to have to take an extra step to re-constrain it back where I had it originally.