38 GPSMAP 620 and GPSMAP 640 Owner’s ManualMarine Mode: Advanced ConfigurationMarine Mode: AdvancedConfigurationUse the Configure menu to configure general unit settings.Use the Menu screen on various chart screens to configure chart-specific information.Configuring System SettingsFrom the Home screen, touch Configure > System.Simulator—turn Simulator Mode on or off.Touch Setup to set Simulator options.• Speed—enter the speed of your boat in simulator mode, andtouch Done.• track Control—touch Auto track to allow the chartplotter toset the heading automatically, or touch User track to set theheading manually.• Set position—select the simulated position of your boat, andtouch Select.• Set time—enter the simulated time, and touch Done.• Set Date—enter the simulated date, touch Done.Language—touch the on-screen language.Keyboard Layout—select QWeRtY for a layout similar to acomputer keyboard, or select ABCDe for an alphabetical layout.Beeper/Display—set beeper and display options.• Beeper—touch Beeper to set when the unit makes audiblesounds. The settings are off, Alarms only, and on (Key andAlarms) (default).• Display—touch Display to open the display menu.◦ Backlight Slider—adjust the intensity of the backlight.◦ Color Mode—touch Color Mode to select Day Colorsor Night Colors, or touch Auto to allow the device toautomatically adjust the colors.◦ Volume—adjust the volume levels.• Screenshot Capture—toggle the screenshot capture feature onand off. With the screenshot capture on, touch and hold Homeon any screen to take a screenshot. The screenshot is saved to aninserted SD card.• Audio out—set to High-Z for best sound quality if your stereohas a high-impedance input. If you are experiencing audiodistortion, try toggling this setting between Low-Z and High-Zto improve audio performance.• Calibrate touch Screen—touch the dots as they appear tocalibrate the touchscreen.