{{Note | The below only describes what needs to be done in {{IMSMANG}}. The sub-theme also needs also to be defined in the imsma.mxd and the map imported again. Contact your [[Management Consulting Team | GICHD IM advisor]] for step-by-step instructions.}}
[[Image:MapDisplayWindow.png|400px|center]]<div align="center">'' IMSMA Themes window''</div> IMSMA allows you to add up to five subcategoriescustomised themes, called sub-themes, to a map themeeach of the IMSMA themes. Sub-themes can be created based on any default IMSMA fields or custom-defined fields (including subobject CDFs) for that theme. For example, you could modify the ''Activity'' theme to include a sub-theme for the ''Booby Trapped'' field.
<p>To add sub-themes:</p>
<ol>
<li>From the Customisation menu, click select '''Sub-Themes Manager'''.</li> [[Image:Customise Subtheme1.png|400px|center]]<div align="center">'' Customise Sub-Themes window''</div> <li>The Customise Sub-Themes window displays. </li> : Each theme contains five blank rows for adding a sub-theme. These are labelled ''UserDefined1'', ''UserDefined2'', ''UserDefined3'', ''UserDefined4'', and ''UserDefined5''.
<li>Select the row of the sub-theme that you want to assign or reassign.</li>
<li>Click the [[File:FieldViewIcon.png]] button.</li>
[[Image:Custom Subtheme picker.png|400px|center]]<div align="center">'' Customise Sub-Themes window''</div> <li>The Custom Sub-Theme Picker window displays.</li><li>Select a default field or CDF from the Sub-Theme menudrop-down list.</li>
<li>Click the '''Save''' button.</li>
:The sub-theme displays in the Source column on the Customise Sub-Theme window.
You can now enable or disable the newly[[Image:Customise Subtheme2.png|400px|center]]<div align="center">'' Updated Customise Sub-assigned Themes window ''</div><li>The sub-theme. For more information displays in the Source column on displaying/hiding the subCustomise Sub-theme, refer to Theme window.</li> [[Enable an IMSMA ThemeImage:MapDisplaySubtheme.png|400px|Enable IMSMA Themecenter]]<div align="center">'' Updated IMSMA Themes window''</div> <li>The sub-theme is automatically added to the IMSMA Themes.</li>
{{note| Once a sub-theme has been assigned to a blank row, that row cannot be unassigned (made blank) again. It can only be reassigned to another sub-theme.}}