VIEWSONIC VS13394 - Manual (Page 51)

Only for this model
Adding Notes
You can add a note for further
reference. Press Menu to display
Options menu for the bookmark/
note list.
Select [add New] note then enter words by tapping
the letter buttons on the soft keyboard. When you are
done, tap [Save] button to confirm inputs.
* You can add up to 20 notes under this mode.