RS designer does not support  the setting of page margin size. Aspose.Pdf for Reporting Services provides four parameters to set the corresponding page margin size, they are:

1)

Parameter Name: PageMarginLeft

Date Type: Float

Values supported:

2)

Parameter Name: PageMarginRight

Date Type: Float

Values supported:

3)

Parameter Name: PageMarginTop

Date Type: Float

Values supported:

4)

Parameter Name: PageMarginBottom

Date Type: Float

Values supported:

Example:

 <Render>

…

<Extension Name="APPDF" Type=" Aspose.Pdf.ReportingServices.Renderer,Aspose.Pdf.ReportingServices ">

<Configuration>

    <PageMarginLeft >50</PageMarginLeft>

<PageMarginRight >50</PageMarginRight>

<PageMarginTop >50</PageMarginTop>

<PageMarginBottom >50</PageMarginBottom>

</Configuration>

</Extension>

</Render>