Stacking and unstacking
You can stack a group of PDF or MAX files into a single PDF file.
To stack PDF or MAX items
Move the files to be stacked to a single folder.
Select the files in the order you want in the stack.
On the Item ribbon, click the arrow next to Combine Items and choose Into PDF Stack.
— or —
Choose Combine Items into PDF in the shortcut menu.
To unstack any PDF or MAX item
Click the file to be unstacked.
On the Item ribbon, click the arrow next to Unstack and choose Current Page or All Pages.
— or —
Choose Unstack in the shortcut menu and then Current Page or All Pages.
To break a large PDF into smaller ones, unstack the large file, then select pages and stack them.