How to Use Magnifier Viewer 1. Go to PDF Reader’s MENUS. 2. Click on “Tool” and choose Magnifier. 3. Hold and drag, You may use the Magnifier to have a closer look of the content. 4. If you’d like to cancel the function, go to MENUS >Tool >Magnifier. Have more questions? Submit a request 0 Comments Please sign in to leave a comment.