If you have 10 spots mapped separately on one lake, you will want want to merge them into one LCM map to display in your Lowrance when you fish that lake. I place all the MP files in the MP folder so I can merge all of them into one LCM map.
Select Tools, Create Iso/contour lines and Polish Format (Lowrance types) (*.mp). Make sure you select the MP folder to save this file.