Changing PDF Output Orientation

I have created report subscriptions for my end users which are emailed
PDF format reports. However, the default report orientation is PORTRAIT
but this format causes the reports to be generated in a very unreadable
way.
Is there a solution to changing the orientation to LANDSCAPE?
Thanks.You can't change the orientation directly - you need to change the
height and width values for the report page (from 11 x 8 1/2 to 8 1/2 x
11).
You also need to ensure the size of the body and the margins are
consistent with these settings.
The Acrobat reader will automatically rotate the page if you have these
settings correct - check the Acrobat settings, too, as it is possible
to have the auto rotate feature turned off.