We can use (find-library) to find the source for a package. Select the package from the list provided.

First we can find the source code for any package and then within the source code we can run (occur) and search for "(defcustom". This will show us all the custom user options available in this package.

Mitsubishi Pencil Company Limited made a mechanical pencil in 2008 that self sharpens by rotating when you lift it off the writing surface.