In Service Catalog portal, the Create Generic Request button is wired to create an Incident. Although you can modify the Generic Request Incident Request Offering, you cannot change the Generic Incident Request Template.
Customers have asked ability to change it so that the Create Request on the home page creates a Service Request instead of incident. Though this is not possible in the UI, but it is possible to do with simple XML editing.
To make sure we are on the same page I am illustrating below the button I intend to change Change the Create Request button to create a Service Request instead of Incident.
<RequestOffering ID="ServiceManager.ServiceCatalog.GenericIncidentRequest.GenericRequestOffering.EN" InstanceName="Generic Incident Request (EN)" Title="Generic Incident Request (EN)" BriefDescription="This request allows you to submit the incident" Overview="Please fill in the form below tosubmit your request" Status="System.Offering.StatusEnum.Published" TargetTemplate="Template.cf7124c72be4425a9ef59c83ab1c7e39">
<PresentationMappingTemplate>
<Sources>
<Source Id="00000000-0000-0000-0000-000000000000" Ordinal="0" ReadOnly="false" Optional="false"ControlType="System.SupportingItem.PortalControl">
<ControlConfiguration>
<Dependencies />
<AddressableOutputs>
<AddressableOutput OutputName="Token: Portal User Name" OutputType="string"/>
</AddressableOutputs>
</ControlConfiguration>
<Targets />
</Source>
</Sources>
</PresentationMappingTemplate>
</RequestOffering>
You are done