baldrick2dogs! thanks for your reply! this is very important! Please check again:
1. Open any PDF Format
2. Find 'DOCUMENTS" in the Menu
3. Click on "Insert Pages"
4. In the open window choose any other PDF file from your comp
5. Click Insert.

Please check if you have this options..
Thanks!

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“You become responsible forever for what you have tamed”. Antoine de Saint-Exupéry