GPSMAP® 585 Plus 13Digital ZoomDigital zoom magnifies the image after it is captured by sonar. It expands achosen area of the sonar picture to vertically fill the left-side of the screen.You can set the zoom manually.1 From a sonar screen select RANGE/ZOOM > Digital Zoom.2 Select or to select between Zoom and Depth.3 Select and to adjust the value.Adjust the zoom ratioDigital Zoom rangeAdjust the depth levelMagnified viewShift ZoomThis is a unique sonar zoom technology from Garmin. It displays the selecteddepth and range of sonar to fill the left-side of the screen in more accuracyand detail. In the Shift Zoom mode the fishfinder CPU only processes thesonar signals received from the selected depth range. You can set the zoommanually.1 From a sonar screen select RANGE/ZOOM > Shift Zoom.2 Select or to select Range or Depth.3 Select and to adjust the value.Adjust the zoom rangeShift Zoom rangeAdjust the depth levelMagnified viewAutoAuto zoom is similar to Bottom Lock but displays a magnified view on theleft-side of the screen of the bottom and bottom fish in the set zoom range.The Auto mode is good for determining the bottom contour. It allows you tochange the depth range above the bottom and the zoom ratio while alwaysshowing the water bottom.1 From a sonar screen select RANGE/ZOOM > Auto.2 Select and or and to adjust the zoom range.Selected zoom rangeAdjust the zoom rangeMagnified View