Global Mapper v17.0.5 (b123015) [64-bit] - REGISTERED
How to change the background colour in Map lay out ?
How to print to different scales? Does it require changing the change of font size for clarity?
Global Mapper Programmer
To change the background color on the layout (inside the margins), use the Page Setup toolbar button. Be aware that the background color of the Map View Element is the same as the main view -- if your Map View element fills the area within the margins, you won't see the background color you choose. (Note that you are using an early version of the Map Layout Editor. I am not sure if the ability to change the background color is in your version -- it may have been implemented in a later release.)
You can set the scale when you create a new map layout, or change the properties of the Map View element.