Rockwell Automation FactoryTalk Historian SE ProcessBook 3.2 User Guide - Manual (Page 115)

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Work with a Display
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4. Click New Layer. The New Layer dialog box appears.
A default name comprised of the word Layer prefixed to the layer
number appears. The layer number does not necessarily match the
index number; it is simply the next unused integer in the list.
A new layer is added to the end of the collection. Its index is one
higher than the previous high index number. All symbols added to this
layer are displayed over symbols on lower indexed layers.
5. Click OK to return to the Layers dialog box.
6. Select the appropriate check boxes:
Visible Makes the elements in the layer visible in Run mode. New layers are
visible by default.
Active Accepts all new symbols as you add them to the display. Inactive
prevents symbols from being added automatically. New layers are
Active by default.
Locked Prevents you from adding symbols to a layer. Existing symbols on
locked layers cannot be cut, copied, pasted, deleted, or moved. New
layers are not locked by default.
7. Click OK.