Having JPG format in SSRS export dropdown

Append the below xml emlement to reportserver.config file under element.

<Extension Name="JPG" Type="Microsoft.ReportingServices.Rendering.ImageRenderer.ImageRenderer,Microsoft.ReportingServices.ImageRendering">
     <OverrideNames/>
         <Name Language="en-us">JPG</Name>
     </OverrideNames>
     <Configuration>
        <DeviceInfo>
             <OutputFormat>JPEG</OutputFormat>
        </DeviceInfo>
     </Configuration>
</Extension>