Please make sure that you have subscribed to the Document 365 service and are signed in your account.
1. In the "Explore" tab, tap the "Split Pages" option.
2. Select the file that you want to split and tap "NEXT".
3. PDF Reader provides 3 split methods for you to choose from, including "Split by a number of pages", "Split by maximin files", and "Split by page ranges".
4. Choose one split method and tap "Start Splitting" to split the PDF.
5. The file(s) will be saved in Split & Merge folder.
For more details, please refer to our pro tip of how to make good use of the PDF splitter .