ASSuming Microsoft software.
Brute force method, Open new document first, highlight the text of interest, press the "Ctrl" and "C" keys at the same time, switch over to the new document, press the "Cntrl" and "V" keys at the same time and the text should appear in the new document.
Slightly refined method. Same steps but instead of Cntrl+C and Cntrl+V, use Edit drop down menu, and select Copy to copy. Use Paste Special to paste as unformatted text.
Larry C