How to combine three pdf files into one

How to combine three pdf files into one?

1. First, use Adobe Acrobat DC software to open a PDF file, as shown in the figure.

#2. Then right-click the mouse on the thumbnail page and select the "Insert Page" option in the right-click menu.

#3. Then click the "From File" option in its secondary menu.

#4. Then in the computer folder, select the other two pdf files that need to be merged and open them.

#5. Then in the window that appears, set the insertion position and confirm.

#6. Finally, save the merged file, so that the three PDF files are merged into one.

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