Members of the default administrator role or custom roles with the appropriate administrative privileges can choose which basemaps your organization uses to create maps, scenes, and apps. You can also set the default basemap, extent, and units.
- Verify that you are signed in as a member of the default administrator role or custom role with administrative privileges to manage the organization website.
- At the top of the site, click Organization and click the Settings tab.
- Click Map and scene on the side of the page.
- Configure any of the following map settings:
Basemap gallery for maps and scenes
To specify the basemap gallery used in Map Viewer, under 2D Group, click the Edit button 
to open the drop-down menu and select the group that contains the maps that will be used as basemaps:
- Choose Default to use only default vector basemaps.
- Specify a custom basemap gallery group in your organization to include basemaps shared with it.
If you specified a custom basemap gallery group, you can click Share basemaps to share the Esri default basemaps with the group.
To specify the basemap gallery used in Scene Viewer, under 3D Group, click the Edit button to open the drop-down menu and select the group that contains the web scenes that will be used as basemaps:
- Choose Default to use only default vector basemaps.
- Specify a custom basemap gallery group in your organization to include basemaps shared with it.
If you specified a custom basemap gallery group, you can click Share 3D basemaps to share the Esri default basemaps with the group.
For both 2D and 3D custom groups, you can also change how the basemaps are sorted in the gallery by selecting a field and a sort option from the drop-down menus under Sort order. If you change the sort field or order here, the items on the group page, as well as in embedded galleries or gallery apps, are also changed.
Note:
You can specify a different basemap gallery for Map Viewer than for Scene Viewer. The Scene Viewer basemap gallery only displays basemaps that are supported in Scene Viewer. Basemaps must meet Scene Viewer tiling scheme requirements to display in the Scene Viewer basemap gallery.
Custom 3D basemaps are not supported in Scene Viewer. The 3D Group section can be used to select a subset of 3D basemaps provided by Esri for use with Scene Viewer.
By default, 3D basemaps provided by Esri are available and can be used in web scenes. To hide these basemaps from users, turn off the Use 3D basemaps toggle button in the 3D Group section.
Map and scene defaults
If you chose a custom 2D basemap group for the Basemap gallery setting, choose a basemap from that group that you want opened when users create a map with Map Viewer. Similarly, if you chose a custom 3D basemap group for the Basemap gallery setting, choose a basemap from that group that you want opened when users create a scene with Scene Viewer. If you chose Default as the basemap gallery (for both maps and scenes), the default Esri basemap will be displayed for new maps and scenes. If you chose None for the default 3D basemap, the default 2D basemap will be used in new scenes.
Note:
Scene Viewer only uses the specified default basemap if it is a supported web scene.
The default basemap opens at the default extent you set. To set the default extent to the extent of your currently selected default basemap, click Use map extent as default. To set a different extent, click Choose extent in the Default extent section. Choose from the following options:
- To create an extent based on the default extent specified for the organization, click Organization's extent.
- To navigate to a place or address, under Use location search, type keywords in the search box. Keywords can include addresses, street intersections, places, points of interest, and longitude and latitude coordinates. The extent centers on the place or address you specify.
- To draw a shape representing the extent, click Draw Extent and drag a box on the map. Make changes to the extent as needed by dragging any of the vertices of the extent box or clicking inside the box and dragging it to a new location.
- To create an extent by specifying coordinate values (in decimal degrees) for the extent boundaries, click Coordinates and type the coordinates in the Top, Bottom, Left, and Right boxes.
Once you have set the extent, click Save.
Under Units, choose US Standard or Metric as the default units for the map scale bar, measure tool, directions, and analysis. US Standard sets the units to miles, feet, and inches; Metric sets the units to kilometers, meters, and centimeters. Users can set the units they see through their settings page.
Include web styles
Web styles are collections of symbols created in ArcGIS Pro and stored as items. Apps such as Map Viewer and Scene Viewer can use web styles to symbolize features with 2D or 3D symbols.
To include web styles in Map Viewer symbol galleries or in Scene Viewer, do the following:
- Create one or more groups.
- Share the web style items with the group or groups you created.
Note:
If you are using the group to include 2D web styles in Map Viewer symbol galleries, you must also share the web style items with the public.
- At the top of the site, click Organization and click the Settings tab.
Note:
You must be signed in as a default administrator or custom role with administrative privileges to manage the organization website.
- Click Map and scene on the side of the page.
- Do any of the following:
- For 2D web styles, click the box under 2D web style group and choose the group you created for the 2D web styles.
- For 2D sketch web styles, click the box under 2D sketch web style group and choose the group you created for the 2D sketch web styles.
- For 3D web styles, click the box under 3D web style group and choose the group you created for the 3D web styles.
The web style items in the specified group are added to the symbol galleries.