Open the drawing Tutorial\3.05 Pipe and pipe the heads in a zone to the corresponding valve. Turn on the LI-HEAD-ZONE layer when you need to see what heads are in a specific zone.
Select Edit Detail and click on any of the placed details. Edit the detail in some fashion where you will see the difference and save it with the AutoCAD Save command.
Open the drawing Tutorial\5.06 Detail Update. On this sheet are details that were purposely saved in an unfinished state for an interim project submittal, to be edited later for a complete submittal.
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Select Edit Detail and click on one of the details. The detail is loaded (notice that it is now finished). Go back to the detail sheet and select Update Details.