Adding a Description attribute to a field element causes that field to appear with a small question mark icon which can be clicked to display the description.


The following Description:
<Column Id="DoNotEmail" Name="Do Not Email" Description="Exclude this contact from email blasts" Type="Bit" Required="true" OnLabel="Do not email" OffLabel="Emailable" OnColor="9d261d" OffColor="388438"/>

Causes the Do Not Email to appear with an Info link: