Hi American Printing,
To do this in InDesign CS6,
1. Select the page tool (third item in the tool bar).
2. Click on the page you would like to rotate using the page tool.
3. Go to the top and swith the page orientation to landscape.
It will only switch the orientation on the page that you selected.
I hope this helps.
If you need further assistance, please let me know.
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Thanks,
Michael Stalteri