Clarify osm plugin documentation

Task-number: QTBUG-55176
Change-Id: Id70a5e501425c7581acc18f7d1aae1c33b42d7ba
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

1 files changed, 5 insertions, 3 deletions

diff --git a/src/location/doc/src/plugins/osm.qdoc b/src/location/doc/src/plugins/osm.qdoc
index bb520601..2d1b4168 100644
--- a/src/location/doc/src/plugins/osm.qdoc
+++ b/src/location/doc/src/plugins/osm.qdoc
@@ -68,9 +68,11 @@ a prefix.
         for geocoding)
 \row
     \li osm.mapping.custom.host
-    \li Url string set when making network requests to the tile server.  This parameter should be set to a
-        valid server url with the correct osm api and the \l{Map::activeMapType} to the corresponding \l{MapType}.CustomMap.
-        The CustomMap will only be available if this parameter is set.
+    \li Url string of a custom tile server.  This parameter should be set to a valid server url offering the correct osm API.
+        To use this server, the \l{Map::activeMapType} parameter of the \l Map should be set to the supported map type
+        whose type is \l{MapType}.CustomMap.
+        This map type is only be available if this plugin parameter is set, in which case it is
+        always \l{Map::supportedMapTypes}[supportedMapTypes.length - 1].
         \note Setting the mapping.custom.host parameter to a new server renders the map tile cache useless for the old custommap style.
 \row
     \li osm.mapping.custom.mapcopyright