ssrs 2012 want to chage paper size to letter size paper

Ah, the old hidden column issue... I am assuming what you mean by 'invisible' is that you are hiding some columns?

You might want to check this thread. I had the same issue... unfortunately at the time there was no workaround - the pagination treated hidden columns as if they were still there, and every second page in my report turned out blank.. nothing i could do.

However apparently it might be fixed now..

http://social.msdn.microsoft.com/Forums/sqlserver/en-US/9ee3f759-229d-45c2-9e41-5fa794e6aa2b/will-ssrs-2008-eliminate-white-space-due-to-hidden-columns?forum=sqlreportingservices

---

Thanks! Josh