Grounds the seed face in model space. Grounded faces cannot move or rotate outside of their current position in space, but they can resize. For example, if you ground a planar face, then move an adjacent face later, the grounded face maintains it position, but can be made larger or smaller when you move the adjacent face. If more than one face is in the select set, all the faces are grounded.

The ground relationship is automatically set to persisted.

You can choose the ground command first. Then define the face(s) to ground.

You can also create the seed select set first and then choose the ground command.