Organize PDF collections
You can manage PDF collections in the Organizer window.
Add a PDF to a collection
Do any of the following:-
Right-click/Control-click the collection, choose Add Files, select one or more PDFs, and click Add.
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Right-click/Control-click the PDF in the files pane, and choose Add To A Collection > [collection name].
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Drag a PDF from Windows Explorer or Mac OS Finder to the collection in the categories pane.
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After selecting a subcategory in the History, My Computer, or Favorite Places category, drag a PDF from the files pane to the desired collection.
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In Acrobat, open the PDF and choose File > Organizer > Add To A Collection. Then either select the collection to which you want to add the PDF or click New Collection, type a name, and click Create.
You can open any PDF from a
collection by using the Open button 
in
the Organizer window or by choosing the PDF filename from a submenu
directly in Acrobat. To open a PDF from a collection in Acrobat,
choose Collections > [collection name] > [PDF filename] from
either the File > Organizer submenu or the Organizer menu 
in
the File toolbar.
Edit the collection folders
- To rename a collection, right-click/Control-click the collection name, choose Rename Collection, and then type the new name.
- To delete a collection, right-click/Control-click the collection name, choose Delete Collection, and then click Yes in the confirmation dialog box. The PDF files within the collection aren’t deleted from their original locations.
- To create a new collection, click the Create A New Collection
button
in
the Organizer window. Or, in Acrobat, choose File > Organizer
> Create A New Collection. Type a name for the collection.
Move a PDF to a different collection
To move a PDF from one collection to another,
select the collection that contains the PDF, right-click/Control-click
the PDF file in the files pane, and choose Move To Collection > [collection
name].