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Box Shapes Showing on Chart
If the Garmin Quickdraw™ Contours recording option is checked to display, it will show on all charts as lines, boxes, or a wavy shape when viewed at higher zoom levels, as seen in the images below. To remove the lines on the chartplotter, uncheck Display in the Quickdraw Contours menu.
On a GPSMAP™ unit from any chart page, press Options > Quickdraw Contours > Display. Turn off
On an ECHOMAP® unit from any chart page, press Menu > Quickdraw Contours > Display. Turn off
Navigation Chart
Raster Chart