I comparing 2 PDF files which has 900 pages in each file. In can i select all the pages in "File Content Checkpoint Properties" window.

I am using 11.50 version and the steps are as below -

1) Design -> Checkpoint ->File Content Checkpoint -> selected the file and clicked on "Open" button -> "File Content Checkpoint Properties" window is opened. there i can able to see 900 pages. How can i select all the pages at a time.