Rockwell Automation FactoryTalk Historian SE ProcessBook 3.2 User Guide - Manual (Page 277)

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symbol without affecting the placeholders defined for any other symbol
using that data set.
Add or Edit Placeholders
To add or edit placeholders:
1. To open the Placeholders dialog box, click Placeholders in the
ODBC Data Sets (page 255) dialog box, or click the Custom
Placeholders button on a symbol definition dialog box.
In this dialog box, you can rename placeholders, change their type or
specify values.
FactoryTalk Historian ProcessBook allows you to create custom
placeholders for a symbol based on a summary Data Set or a FactoryTalk
Historian tag placeholder in an ODBC data set. Placeholders are not allowed
for expression Data Sets. The Custom Placeholders button in symbol
definition dialog box boxes allows you to specify different FactoryTalk
Historian tags for a FactoryTalk Historian Summary Data Set or ODBC data set
with a FactoryTalk Historian tag placeholder. The change applies only to the
configured symbol.