It's like using a sharpie on your screen but without the mess and ruined screens! Need to highlight your emails? Want to make some comments on a PDF? Desire to draw a dinosaur on your boss's face and then send it to him? Just launch what ever app you want to draw on, draw, then press and hold volume down + power and take a screenshot of it!
Now with S-Pen support for the Galaxy Note, Note II and any S-Pen compatible device!
This lets the app actually create floating windows. The app will not abuse this to spam the device. The app will only use this to create the floating windows necessary.
Used when a button is clicked in the notification to close the status bar.
Both of these are used for Per app drawing. Writing to external storage happens when the app saves your drawing to disk for later use.
Get tasks happens when you start to paint and the app checks for what app is running underneath so it knows if it should give you a new canvas or pull up a new canvas for you to draw on for this specific app.