All Constraints (multiphoto and/or axes constraints), have a unified method for being added, removed, and modified.
Constraints can be added two ways. The first is through the Constraints Dialog, and the second is through the Constraint Tool Bar. Both are described below.
Constraints hold two types of data. The first is a list of the objects to be constrained and these are modified by using the Constraint Tool Bar. The other type of data is the constraint parameterization, which is manipulated by the Constraints Dialog. See the sections below for details.