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Optional Regions: An optional region is a region in a template that users can set to show or to hide in a template-based document. You can use an optional region when you want to set conditions for displaying content in a document.

How to modify optional region template parameters
 

Step 1) Select Modify > Template Properties.

The Template Properties dialog box opens, showing a list of available properties. The dialog box shows optional regions and editable tag attributes.

Step 2) In the Name list, select "OptionalRegion".

Step 3) Select the Show checkbox, to show the optional region in the document, or deselect the checkbox to hide it