About groups
A group is a collection of components. To simplify a graph, group components, and then save the graph as a custom view. Groups have these characteristics.
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There are two types of groups: system-created and user-created.
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Groups can be nested; that is, a group can contain one or more other groups
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Groups can be collapsed or expanded
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Groups can be positioned anywhere on the graph.
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Groups can be ungrouped.
When you hover your cursor over a group, a tooltip window shows a summary of the group’s contents.
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