BackgroundColor changes the default background color from white to the color passed.

New constructs a new Viewer.

ServeOtherFiles looks at path "from" and serves files below that directory with the extensions in "exts".

UseDoc says to use this custom doc object and add the *Gear as the last element in the doc's Body.Elements list.

Viewer provides an HTTP server that will run to view an individual component without having to spin up the entire page and service.

Option provides an optional argument to New().