qgis/Quantum-GIS — pull request #567 by nyalldawson (2013-04-29 11:53:07+00:00)
Title: Add blending mode for overview frame, option to invert overview frame

I'm submitting this is a pull request since it adds a new feature. Permission was granted for a freeze exception for the blending mode option for overview frames, but I've also added a related option to invert the overview frame (ie, shade in the area which isn't covered by the linked map).

I'll let someone else accept this request if this additional feature is OK to add.