Map page with Split ScreenTo resize the Map page sonar split screen:1. After showing the Sonar and Map pages together in the splitscreen as described in the previous steps, press Menu.2. Highlight Size Split, and press Enter.3. Use the Rocker to move the sizing-arrow right or left.4. Press Enter.5. Press Quit to stop resizing the screen.You can also pressMenu, highlight Stop Resizing, and press Enter to stopresizing the screen and retain the previous split setting.Using the Sonar PageGPSMAP 585 has an built-in sonar module which allows you tosimply plug in the optional transducer to make GPSMAP 585 apowerful fishfinder/flasher. “Sonar Turned Off Please Check theTransducer Connection” message appears on the Sonar page if thetransducer is not properly attached..The middle of the page contains a right-to-left scrolling sonar imageof the water beneath your boat. Items appear as they pass under thetransducer. The adjustable scale displays the depth of the water. Theinformation in the upper-left corner allows you to adjust the scaleand displays the water temperature.Sonar page70 GPSMAP 580/585 Owner’s ManualSetting Up and Using Sonar