Change Opt-in verbiage

Is there a way to change the Opt-in verbiage that appears immediately after they click Opt-in? The immediate web page says Thanks for subscribing, even though they were just completing a Contact Us form, not subscribing. I can’t figure out where this setting is located.

Hi Andy!

If your contacts are selecting “opt in” through a web form or landing page then the immediate web page that follows is called the “thank-you page” and is editable by clicking the tab of the same name at the top of your relevant editing screen. So to re-phrase, go in to the form editor and click on what should be the second tab at the top!