The rest position settings for each constraint
are located in the constrained object’s constraint attributes.
Enable Rest Position
If on, the rest position is active for the constrained
object. If off, the rest position is inactive for the constrained
object. Turning Enable Rest Position off does
not remove it from the constrained object.
Rest Translate
Sets the X, Y, and Z translation for the constrained
object’s Translate rest position. These fields are present for only Point and Parent constraints.
Rest Rotate
Sets the X, Y, and Z rotation for the constrained object’s Rotate rest
position. These fields are present only for Orient, Aim, Parent, Tangent, and Normal constraints.
Rest Scale
Sets the X, Y, and Z scaling for the constrained object’s Scale rest
position. These fields are present only for Scale constraints.