Multiple Word 2003 Docs

In the past, if I opened multiple docs in Word, I could access the other docs from the Window menu (doc1, doc2, etc.).
With this version of Word, if I select multiple docs to open, a new Word window opens with each document. This takes up desktop space and uses more system resources.
Is there a method (I can’t find one) to prevent Word from opening new windows for each doc and go back to selecting the current doc from the Window drop-down menu?