Constrain > Parent >

Maintain Offset

Preserves the original (state prior to constraining), relative translation and rotation of the constrained object. Use this option to maintain spatial and rotational relationships between constrained objects. See Offset parent constraints.

Animation Layer

Lets you select an animation layer where you want to add the parent constraint. See Create a parent constraint for more information.

Constraint Axes

Determines whether the parent constraint is restricted to a specific axis (X, Y, Z) or to All axes. When All is checked, the X, Y, and Z boxes are dimmed.

Weight

This is useful only when there are multiple target objects.