The icon is very simply composed of an empty circle with a large, upper case letter A in the center, about as wide as the circle's radius. The icon stands for the presence of additional elements outside of the ones currently being represented on the screen.
This Additional icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office
, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,800 icons, all in the same style and quality.