Update readme.

Author: CalebRas

Shared/Samples/Add tiled layer as basemap/README.md

@@ -2,11 +2,11 @@
 
 Load an offline copy of a tiled map service as a basemap.
 
-![Image of add tiled layer as basemap](AddTiledLayerAsBasemap.png)
+![Screenshot of Add tiled layer as basemap sample](add-tiled-layer-as-basemap.png)
 
 ## Use case
 
-Constructing an `ArcGISTiledLayer` from a local tile package (.tpk & .tpkx), allows you to use that basemap tiled service when the application is offline. Dividing a raster into tiles allows the map to provide relevant tiles and level of detail to the user when panning and zooming. For example, when working in an environment that has no connectivity, this could provide access to a map for navigating your surroundings.
+Constructing a tiled layer from a local tile package (.tpk & .tpkx) allows you to use that basemap tiled service when the application is offline. Dividing a raster into tiles allows the map to provide relevant tiles and level of detail to the user when panning and zooming. For example, when working in an environment that has no connectivity, this could provide access to a map for navigating your surroundings.
 
 ## How to use the sample
 
@@ -17,7 +17,7 @@ Launch the app to view the "San Francisco offline tile package" as the basemap.
 1. Create a `TileCache`, specifying the path to the local tile package.
 2. Create an `ArcGISTiledLayer` with the tile cache.
 3. Create a `Basemap` with the tiled layer.
-4. Create an `ArcGISMap` with the basemap and set it to a MapView.
+4. Create an `ArcGISMap` with the basemap and pass it to a MapView.
 
 ## Relevant API
 
@@ -28,13 +28,11 @@ Launch the app to view the "San Francisco offline tile package" as the basemap.
 
 ## Offline data
 
-Link
----------|
-|[San Francisco offline tile package](https://www.arcgis.com/home/item.html?id=e4a398afe9a945f3b0f4dca1e4faccb5)|
+This sample uses the [San Francisco offline tile package](https://www.arcgis.com/home/item.html?id=e4a398afe9a945f3b0f4dca1e4faccb5). It is downloaded from ArcGIS Online automatically.
 
 ## About the data
 
-The map opens to a view of the city of San Francisco, CA. In a disconnected environment, this basemap tile service would be fully accessible to zoom and pan as if you were connected to a online service.
+The map opens to a view of the city of San Francisco, CA. In a disconnected environment, this basemap tile service would be fully accessible to zoom and pan as if you were connected to an online service.
 
 ## Additional information
 

Shared/Samples/Add tiled layer as basemap/README.metadata.json

@@ -2,7 +2,9 @@
     "category": "Edit and Manage Data",
     "description": "Load an offline copy of a tiled map service as a basemap.",
     "ignore": false,
-    "images": [],
+    "images": [
+        "add-tiled-layer-as-basemap.png"
+    ],
     "keywords": [
         "cache",
         "layers",