If the text box won't resize in Word or Excel, check if the document is opened in the Compatibility Mode, and convert it to a newer format.

How to Format Text in an Excel Spreadsheet. Excel's text formatting capabilities can make the results of your financial, statistical or scientific spreadsheet calculations more esthetically ...

Learn how to delete a text box without removing text in Word or Excel using Format Shape pane, setting the text box to No Outline, and more.