In Core, how to update Main NAvigation Links?

Hello Community,

volunteeryukon.ca uses Core for our website, and it works like gangbusters. Recently we’ve had to update the destinations of some of the links in our site’s “Main Navigation”. While browsing through the various menu options in Core’ Admin panel, we’re having a world of trouble figuring out where we can make changes to the Main Navigation. We can find where to update, remove, and add pages, pictures, files, but the Main Navigation editing capability remains concealed.

IF anyone has any tips on where we should be looking, it would be most apreciated!

From what I can tell, our site uses the “Structure” add on for most or all of its pages.

Thank you! Volunteer Bénévoles Yukon