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Level 10

Hi there,

There would be much for you to learn on how to expand text fields,

I'll explain briefly and provide you with short videos on how to work with Flowed Forms

First of all, if you want a text field to expand, you should make sure that each subforms / page which are a parent of that text field are Flowed Content

Second, make sure your textfield is Expand to Fit (Height)(You've already done this as I can see)

Third, (if you want your text field to skip to next page if the flowed content is too big for one page) make sure all its parents are Allow Page Breaks Within Content

Allow Page Breaks within Content should also be applied to your text field

Four, set the text field Allow Multiple Lines & Field Format should be Rich Text to avoid any minor errors when treating values

If you have any other questions about LiveCycle, here is a youtube channel which helped me a lot to understand PDF Form with LiveCycle Designer

True Tech Troubleshooting - YouTube

And for videos which will help you in your current issue here is 2 different basics information

Form Flow in Adobe LiveCycle Designer ® - YouTube

Basic Text Fields in Adobe LiveCycle ® - YouTube

Hope this help!