I have 16 Reports in my current application. when I export the reports through Export drop down menu to PDF file, it saves to my local disk. But when I open the PDF through Adobe Acrobat Reader it opens it with a different zoom size for each report. Why I am getting this kind of behavior.
Can I set a default zoom size for all the generated PDF dynamically ??
You can't change the zoom level of generated PDFs in Reporting Services.
The zoom is managed by the viewer application, which is Adobe Acrobat Reader in your case.
There is no details about it in the documentation because this feature does not exist, but here is a link to a question on MSDN forums where somebody from Microsoft confirms that there are no ways of doing it: