By using the Stylus as Pen mode, you can freely handwrite or draw with your stylus, while using your fingers to move and zoom in and out of the document.

1. While on one of the file browsing tabs, tap menu button:

2. Tap Settings in the side drawer:

3. Under Stylus, enable Stylus as Pen mode by tapping the toggle bar to ON.

4. Open a document you want to annotate. You can start writing or drawing on the document with your stylus right away without selecting a tool. You can move and zoom in and out of the document by using your fingers.