{{Note | The steps below describe what needs to be done in {{IMSMANG}}. The sub-theme needs also to be defined in the imsma'''[[IMSMA.mxd ]]''' and the map should be imported again. These steps are described in [[How to work with Sub-Themes in IMSMA.mxd]].}}
IMSMA allows you to add up to five customised themes, called Sub-themes, to each of the IMSMA themes. Sub-themes can be created based on '''single-select''' {{IMSMANG}} system fields or Custom-Defined Fields for that theme.