Can I reveal hidden text in a dropdown sort of way?

As seen in many FAQ pages, you can read a line of text, then click the text and it will reveal hidden text in a dropdown sort of way. In the footer of my website (Forte template) I have a copyright notice. I'd love to be able to click that line of text and have a more detailed prescript reveal underneath it.

Is there a way with Code Injection or a code block, much like making anchor links that this is possible?

You can set that up using a Markdown Block:

http://www.silvabokis.com/squarespace-tips/how-to-create-hideshow-faqs-in-squarespace