You can instruct the software to show or hide non-power flow association connectors
on a typical cable block diagram. On the Edit drawing toolbar, select Edit 
or select Edit > Show/Hide Association Connectors.
By hiding the association connectors, you are not dissociating the items from each
other. You can use one of the following methods to cancel an association:
-
Select the required logical connector and then press the DELETE key.
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Select Remove
on the Edit drawing toolbar.
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Remove one of the associated items from the drawing.