Background Charts
If exporting map images from DrDepth save as a jpg file into a new folder. Choose KML calibration.
In IMC go to Keyhole Mode and select the kml file you just made - hit build.
This will now create a jpg calibration file in the same folder.
Now go to Raster Mode - select your range scale using (for example) 1 as minimum and 32 as max .
Set the ShadedRelief folder on your SD card or Emulator (if it has one) as the work directory
Hit "Build"
Thats it. The chart is now ready to run as your background chart in the ShadedRelief Folder on your SD card. Do not change the names !