Please make sure that you have subscribed to the Kdan Deluxe Business Pack and are signed in your account.
1. Tap for the PDF Documents management page.
2. Tap "Edit" at the top bar and you will see a check box listed in front of each file/folder.
3. Select the two files you want to merge, tap the check box next to the files, and tap “Merge” on the toolbar.
4. You will see a pop-up menu where you can adjust the order in which documents will be merged by tapping the arrow buttons. Tap “Start Merging” to merge.