The Edge Relationship Tool can be used to establish geometric relationships between frame edges. The Tool is shown in the InDesign Tool panel as 
When the parent frame is moved, the distance between the parent and child edge remains the same.
To create a relationship, click the frame edge of the parent frame, then click the edge of the child frame. EasyCatalog automatically maintains the distance between both edges when the parent is resized or moved.
To remove a relationship, click an existing parent edge and the corresponding child edge.
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