How to open a document file
PDF2XL has several methods for opening PDF files:
Open File Dialog
Drag & Drop
Another way to open an existing file is to drag it straight from a Windows Explorer window, and drop it anywhere inside the PDF2XL window.
If you want to open a file you've recently used in PDF2XL, you can find your recent files both as a tab in the Open File Dialog, and as an item in PDF2XL's Start menu.