Originally Posted by iago
After creating a lot of points by trying to drag them, I noticed another phenomenon. The snap-in is sensitive to the x-coordinate of the respective point, that is along a vertical line through the point.
That could be used as workaround to correct erroneous points
May I point out this again: do not drag the point
. After the cursor changes into pointing hand just move the cursor up or down to desired level then make a single classical click. Be aware that the mouse cursor should be moved vertically
so its snapping with the point is maintained. (This actually means that frequency of the point won't change)