How can I change the location of my Backups? (e.g. Word files)

I am wondering how I can change the location of my word doc. back ups. Everytime I make a new word document my computer makes a duplicate titled: " Backup [then the title I gave the word document]." I was wondering if I could make a single file to store all of the back ups. Currently they are in every file that the original is in. Thanks!