Adding “extra scripts”

I am researching the possibility of using the Hueman theme and have a question (well a few but I’ll start with one).

I’m currently using another theme that lets you add extra scripts from the WP dashboard Appearance–>Customize menu. Some things like Facebook or Twitter and certain ads require putting a piece of code in the body in order for the ad or Facebook like/share app to work.

For example in order to be able to use a Twitter follow button in the side bar for example I first had to add (paste) this code to the “extra scripts” options that my theme has: <script src=”https://platform.twitter.com/widgets.js&#8221; type=”text/javascript”></script>

I don’t know the right term but I think it may be like a function call or something like that.

As I mentioned my current theme is amazing in that respect because it allows me to just paste the ‘extra scripts’ there and save and done. EASY!

That said, does Hueman or Customizr have this option and if not how would I add such scripts like I described above…please let me know how one would go about adding extra footer js scripts (not scripts to be displayed just scripts that are required for other scripts to work).

thanks