Final answer:
The arrow mark on the bender is used for the outside bends, and the star mark is for the center bend in a three point saddle bend. The outside bends are made at half the angle of the center bend using the arrow mark after placing the center bend on the star mark.
Step-by-step explanation:
The marks on the bender used to bend a three point saddle bend are the arrow mark and the star mark. The arrow mark is used for the outside bends (twice), and the star mark is used for the center bend. When creating a three point saddle bend in a conduit, you typically measure and mark your conduit for the center of the saddle first. Then, placing the center bend on the star mark, you make your first bend to the desired angle.
After the center bend is made, you flip the conduit and align the edge of the first bend with the arrow mark to make the two outside bends. The outside bends are typically made at half the angle of the center bend. By following these steps, you can create a saddle bend that allows the conduit to avoid obstacles while maintaining a neat and professional appearance.