EditPad itself comes with full documentation as a context-sensitive help file. Press F1 while using EditPad to bring it up.
You can download the EditPad 8 manual in PDF format. You can also read the user’s guide online in your web browser. These links point to the website for EditPad Pro. There is only one manual for EditPad. It fully covers the Lite and Pro versions and clearly indicates which features are exclusive to EditPad Pro.