When you’re working with large pieces of text in Microsoft Publisher, you may find it easier to work in Word rather than Publisher. This way you can concentrate on your text without having to deal with layout issues.
Then, when you have finished settling your text, import it into a Publisher text box by clicking in the text box and choose Insert, Text file and browse to locate and import your file.
On the other hand, you can edit a piece of text in Word from inside Publisher if you right click a text frame in Publisher and choose Change Text, Edit Story in Microsoft Word to export it to Word. When you’re done, choose File, Close & Return to return to Publisher.