How to change the map-list background to pure black (RGB = 0,0,0)?

gumshoejm Member Posts: 1 New Here
edited May 24 in Ask the Community

How can I get a pure black (RGB = 0,0,0) background for my map-list? The available themes offer white and charcoal backgrounds I need to insert the resultant image into a PowerPoint where all slide backgrounds are black.