Enabling paragraph breaks for a text box or rich text box lets users create new paragraphs of text when they are typing information into the control.
Right-click the control for which you want to enable or disable paragraph breaks, and then click Control Properties on the shortcut menu.
Click the Display tab.
To enable or disable paragraph breaks, select or clear the Paragraph breaks check box.
Note: If you are designing a browser-compatible form template, you cannot disable paragraph breaks for a multiline text box or rich text box.