{{Note | The steps below describe what needs to be done in ArcGIS. The sub-theme needs also to be defined in {{IMSMANG}}. These steps are described in [[Customise Sub-Themes]].}}
If you would like to add a Sub-Theme, you need to use [http://desktop.arcgis.com/en/desktop/ ArcGIS software] to update '''[[IMSMA.mxd ]]''' which is located in ''C:\IMSMAng\server\gis\maps'' folder.