336MapSource Info — shows the number ofmaps downloaded from the optionalMapSource software package and the amountof memory used (in kilobytes). MapSourceallows you to supplement the built-in mapwith additional detail, including residentialstreets. Each downloaded map is describedby name, and may be deselected if you wishto retain the map in memory, but not displaythe data on the Map Page. (When a MapSourcefile is selected, the boundary for any down-loaded map is shown on the Map Page as agray shaded outline.)To display the MapSource Info Page:1. Highlight ëMapSource Infoí and press ENTER.2. Use the rocker keypad to scroll through the list ofdownloaded maps.3. To select/deselect a map, highlight the box to theimmediate left of the desired map. Press ENTERto select/deselect the map. The map is selectedand will be displayed on the Map Page when anìXî appears in the box adjacent to that map.Measure Dist— allows you to measure thebearing and distance between any two pointson the map display.To measure bearing and distance be-tween two points:1. Highlight ëMeasure Distí and press ENTER. An on-screen pointer will appear on the map display atyour present position.2. Move the cursor to the desired reference point (thepoint you want to measure from) and pressENTER.3. Move the cursor to the point you want to measureto. The bearing and distance from the referencepoint will be displayed at the top of the page.Restore Defaults— resets all data fields tothe factory default settings.To restore the factory default settings,highlight ‘Restore Defaults’ and pressENTER.REFERENCEMap pageOptionsThe MapSource Infopage lists detailed mapsthat have been down-loaded from the optionalMapSource softwarepackage.When using the ‘Mea-sure Dist’ option, the ar-row includes an ‘EnterReference’ prompt andthe arrow position ap-pears at the top of themap display.