You can convert your PDF files to documents, spreadsheets, ePubs. Note that PDF conversion is a Premium feature and requires internet.
1. Open your PDF file.
2. Tap menu in the top right.
3. Tap Export and select the format.
4. Tap OK.
Alternatively, in Edit mode:
1. On the Home tab, swipe the toolbar to reveal more options.
2. Tap Export to [...]
3. Tap OK.
If prompt to upgrade, check your license level.