Choose Home tab→Relate group→Rigid Set 
.
Note:
In the Draft environment, the Rigid Set button is located in the Sketching tab→Relate group.
Click the elements to add to the set.
Note:
You can hold the Shift button and click an element to remove it from the set.
On the Rigid Set command bar, click the Accept button.
Tip:
You cannot locate 2D elements that have an include, offset, include + offset, or include + rigid set relationship.
You cannot locate existing dimensions and annotations.
You can locate elements that have a rigid set relationship. Locating an element in a rigid set removes it from the existing set and places it in a new set.