Brightness

We’ll be using the default Bing aerial imagery layer for tracing. The background imagery can be difficult to see, but increasing the brightness will help. You can do this in the “Background settings” tab (Shortcut: b).

https://cloud.githubusercontent.com/assets/7816685/6696648/4a1e8fde-ccc1-11e4-92a2-800ee7e41b65.gif