hello,
My ArcMap (10.3) session layout includes two data frames.
One data frame approximates Earth as a globe and is 3.6166-inches by 3.64-inches. It includes three geodatabase features: a layer of the world's countries, a layer of Uganda overlayed on the former, and a layer of the world's oceans, dissolved to have only one feature. The ocean layer features a circular gradient fill symbol with the following settings: Intervals: 100, Percentage: 100, and Angle: 90. The data frame settings for border, background, and drop shadow are in their default.
The other data frame fits across the entire map area and sits below the "globe" data frame.