What are these white squares?

Some users have experienced white squares appearing when working in SketchBook. We call this "tiling" and have done some investigation to find out why this is happening. It is due to devices running out of GPU and CPU. What does this mean? If your device has too many apps, it starts to complain with continued use of an app. Some apps will be closed by your device, once memory gets really low. Others won't even open. For SketchBook, it will remain open as long as it can. The white squares are indicators that your device is struggling and very low on processing memory.

To avoid this issue, we recommend reducing the number of apps on your device. Next, close apps running in the background that don't need to be open. Finally, save often. One of your best friends when using SketchBook is Save current sketch as a copy. It creates a new file (copy) and saves the sketch with the changes to that file, while preserving the original.