
Microsoft Edge has a lot of features baked in, but I don't blame anyone for missing them. Some are tucked away or off by default. Others are shipped without much fanfare. And some, such as Drop, live within the Sidebar, a part of Edge that I bet a lot of people have never used.
The Sidebar is a toolbar that's roughly the shape and size of a smartphone. You can pin websites to it or use a handful of built-in tools, like a calculator or search. You used to be able to open the Sidebar with a keyboard shortcut, but that seems to have gone away with the introduction of the Bing icon in Edge. You can set the Sidebar to always be shown, however.