Combining Adobe PDF documents.
You can use the Insert command to append or insert an Adobe PDF document into another PDF document.You can also insert one or more documents into a PDF document using drag and drop.
To combine files using the Create PDF From Multiple Files command, see Combining multiple files into one Adobe PDF file.
To combine two Adobe PDF documents using the Insert Pages command:
1. With the target document open, choose Document > Pages > Insert.
2. In the Select File to Insert dialog box, select the source document you want to insert into the target document, and click Select.
3. In the Insert Pages dialog box, specify where you want to insert the document, and click OK.