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- Press Enter to move the points, and the face preview is updated. If necessary, you can now move other points. In this case, a single point is selected (rather than using a selection window).
- This point will move in both Y and Z.
The preview now shows all three moved points. The two points that were not moved are used to hold the face in place. You can increase the number of isolines to better visualize the deformed face. 
In this view, you can see the movement in Y of the single point shown. 
And in this view, you can see the effect of the constraint points, those not selected to move. 
Local menu options:
Note: For Linked neighboring faces and Fix Tangent, see Pressure Load
Delete constraint: Deletes the selected point or points. The deformation or constraint effect on the face will also be removed. 
One Step Back: Use this if you want to change delta values for the points just moved. 
Move Along Normal: Moves the points in a direction normal to the surface. In this case, you only need to specify a single Direction value. 