Consider using the FitToPages option. As in:
[pre]
ODS TAGSETS.EXCELXP FILE="c:\temp\large.xls" OPTIONS(PAGES_FITWIDTH="2" FitToPages="YES") ;
[/pre]
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The following web-page was helpful to me at the time of this post.
http://support.sas.com/rnd/base/ods/odsmarkup/excelxp_help.html
Also using ...
[pre]
ODS TAGSETS.EXCELXP OPTIONS( doc="help" );ODS TAGSETS.EXCELXP close;
[/pre]
...will output useful help documentation to the log stream.
I really find TAGSETS.EXCELXP helpful. I'm thankful to those whom have worked on this.