There's no copyright symbol on any common keyboard, but it's easy to insert the symbol whether you're using Windows or a Mac.

You can add a superscript or subscript in Google Docs by selecting text and using the Format menu or through keyboard ...

Your computer keyboard has about 64 keys on it. That’s great for letters and numbers—but what about symbols, like these? On the Mac, it’s worth learning them. Hold down the Option key and type 2 for ...