To show the fish arches you will need to press the menu twice and go over to your Sonar menu. Then go down to the Beam Select and change it to 200/83khz. The reason being is that the 200khz is a narrow cone. The fish has to pass all the way threw the cone to get the fish arch. By making the cone angle wider using the 200/83 cone you will have a better chance with the fish traveling threw the cone angle.