Add custom icon blurb.

diff --git a/README b/README
index d9489779bb22f93e9f258213d0353179db1bf70e..cf7ffcd737c434d4124bc963923f39ebb5b9d1f9 100644 (file)
--- a/README
+++ b/README
@@ -172,6 +172,13 @@ THE FORMATS
 
                gpsbabel -D9 -i garmin -f usb: -o gpx -F blah.gpx
 
+        Custom icons are supported on units that support that.  Neither
+        GPSBabel nor your firmware know what is associated with any
+        given slot number.  They don't know that the picture you placed
+        in the first slot is a happy face, they only know they're in the
+        lowest numbered slot.  GPSBabel names the them consistently with
+        Mapsource, so they are named 'Custom 0' through 'Custom 23'.
+
     GPSMAN
 
        GPS Manager can read and write formats that this converter doesn't