The way I do it is, I open another window, then I find the hub I want to insert in the hub, highlight it in the browser, click on edit and copy it. Then I go back to my hub and print the name of that hub. Afterwards I highlight the name of the hub that I've just printed, then the icon "add a link" will light up, click on that, it will take you to a place where it will ask you to insert the URL, right click and paste, drop down to where it says, "insert," voila, you've got it. Go back to your hub and it should be blue. Now I'm certain there is a more concise explanation, but I don't know it. Perhaps someone else can give it. If you don't get it from my explanation wait for another answer. Please let me know if it works for you, I might have missed a step.