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Linking Layers

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Layers in a multi-layer graph or graph window do not have to be linked. When no link exists, graph layers are completely independent -- in terms of size, position on the page or axis scale values -- and any layer may be resized, moved or have its axis scale values modified, without affecting other layers on the page.

However, there are various possible scenarios under which it might be advantageous to link the layers in a multi-layered graph:

When you create a link between two graph layers, we refer to the "linked to" layer as the parent layer. When referring to the "linked from" layer, we use the term child layer (For example, if layer 4 is linked to layer 2, then layer 4 is the child layer and layer 2 is the parent layer). The parent layer is the controlling layer. Child layers can be configured to track changes made to the size, location or axis scales of the parent layer.

Layer links are of three general types:

Note: All child layers need not be linked to the same parent layer. It is possible, for instance, to have a three layer graph in which layer 2 is linked to layer 1 and layer 3 is linked to layer 2. However, parent/child linkages are only preserved when changes are made directly to the parent layer. If the changes are made to a layer that is both parent and child, some linking relationships will be broken. Therefore, it tends to be easier to manage linked layers when all child layers are linked to a common parent layer.

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