Here are some simple instructions on how to combine multiple PDFs into a single PDF using Adobe Acrobat DC.
To combine multiple PDFs into a single PDF using Acrobat
Step 1
Open Acrobat Pro DC and click Tools (found on the upper left corner of the app).
Step 2
Click Create PDF.
Step 3
Select Multiple Files and click Next. You can now drag and drop the PDF files that you want to combine together onto the dashboard.
Step 4
Click Combine to create a single PDF file. Then you can download the new file you’ve just created.