[Return to the Adobe Reader: LSU Overview]
By default, Adobe Reader 9 will detect the kind of monitor that is being utilized and will choose the best option for text smoothing. To change this option, follow these steps:
1. Click Edit | Preferences.
2. Choose the Page Display category.
3. Under the heading labeled "Rendering," there a menu next to "Smooth Text." Choose the desired option from that menu.
Referenced from: Adobe.com