It has been brought to our attention that some people have used a dry erase marker on the Method of Speaking Selection Diagram (the mylar, aka, the transparency) and found that if you rub hard to remove the color, some of the black print also comes off. If you have had this experience, scroll up to Data Sheets and Other Downloads, download a printed copy of The Selection Diagram, and follow the printed instructions to replace this diagram. Or, contact us, and we will send you a replacement.
If you have not used your diagram yet, please use a washable marker or what is often called a wet erase marker. After you are finished making a selection, hold the diagram under cool water and gently dry with a paper towel.