*PDF files are created with a set (A4 or A3) size, which cannot be changed. This size is perfect for printing on 8.5 by 11 inch paper, but does not fit most modern computer monitors very well.<ref>http://www.ehow.com/list_5925177_disadvantages-pdf-format.html</ref> | *PDF files are created with a set (A4 or A3) size, which cannot be changed. This size is perfect for printing on 8.5 by 11 inch paper, but does not fit most modern computer monitors very well.<ref>http://www.ehow.com/list_5925177_disadvantages-pdf-format.html</ref> |