That depends on whether you wish to start a whole new document, or modify an existing one for a new purpose…

• To Create a New Resume or Letter: Go into My Resumes (or My Letters) and click Create New Resume (or Create New Letter). Follow the step-by-step instructions that pop up in the left margin.
   
• To Modify an Existing Resume or Letter for a New Employer:  Open the original document and click the Duplicate button (toward top-left of screen). This creates an exact copy of the original, which you can save under a different name. You can then edit the newly named “duplicate,” without changing the original. (Create as many versions as you want!)