diff --git a/README.md b/README.md
index 041ea6e9..08bb2017 100644
--- a/README.md
+++ b/README.md
@@ -48,7 +48,7 @@ MeshCore Open is a cross-platform mobile application for communicating with Mesh
 - **Live Map View**: Real-time visualization of mesh network nodes on an interactive map
 - **Node Filtering**: Filter by node type (chat, repeater, sensor) and time range
 - **Location Sharing**: Share GPS coordinates and custom markers with contacts
-- **Offline Maps**: Download map tiles for offline use in remote areas
+- **Offline Maps**: Download map tiles for offline use in remote areas (with [StadiaMaps](https://stadiamaps.com/pricing/) Free Subscription API-Key)
 - **MGRS Coordinates**: Support for Military Grid Reference System coordinate format
 
 ### Device Management
diff --git a/documentation/settings.md b/documentation/settings.md
index 74e8c933..53ef277f 100644
--- a/documentation/settings.md
+++ b/documentation/settings.md
@@ -83,6 +83,10 @@ Not shown on web. Controls on-device message translation powered by a locally-do
 - **Show Other Nodes**: Toggle room/sensor markers
 - **Time Filter**: All time / Last 1h / Last 6h / Last 24h / Last week
 - **Units**: Metric / Imperial
+- **Raster Tile Source**: Sets the MAP theme and with that from where to get the map tile data:
+  - OpenStreetMap (Auto/Standard/Dark) is provided by the free OpenStreetMap tile server. (Can only be used for live view or already cached.)
+  - Stamen Terrain / AlidadeSmooth Dark / Outdoors / OSM Bright are [StadiaMaps.com raster tile maps](https://stadiamaps.com/products/maps/interactive-basemaps/) for which you can choose an Hosted Endpoint (Worldwide / Europe hosted) and have to provide the API key to your subscription. (You can cache these maps for offline Map usage.)
+  There will be no account provided by meshcore-open. You will have to get you own subscription. StadiaMaps offers a [free](https://stadiamaps.com/pricing/) subscription to download up to 200'000 Standart Raster Basemap tiles.
 - **Offline Map Cache**: Navigate to tile download screen
 
 ### Debug