Links to pages outside of the RT
A sensible distinction between internal (links to other parts of the RT) and external links to other websites, forms, social media etc is to make the external links open in a new tab.
The way to do this is with a little bit of html:
<a href="LINK" target="_blank" rel="noopener noreferrer">TEXT</a>
just copy that on the page you are editing and add your URL where it says LINK and the words you want to appear as the hyperlink itself where it says TEXT