Expandable Text Box Keeps Overlapping Other Content

hello,

 

i creating form in livecycle. have tables in form starting overlap content below them expand accommodate text typed in them. have been watching video below , presenter able have content below pushed below text expands. every time try wrap text "wrap in subform" option either grayed out or cannot click checkbox in "object" "allow page breaks within content".  suggestions of need do?

 

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