Merge PDF files, two or more, by using the Adobe Acrobat Reader Combine PDF function. Adobe Acrobat Reader DC is the cloud-based version of Adobe Acrobat Pro.

Fix Adobe Acrobat Reader could not open PDF because it is either not a supported file type or because the file has been damaged error on PC.

A few weeks later the companies announced that iOS devices could open files from Dropbox. And you can also open files from Dropbox in Acrobat Reader and Acrobat DC on desktop.