I'm impressed with the improvements since 2.5

But the differences are hitting me at once and there are a couple of things I have to get used to!
In the Materialise Theme, there is a container across the top with a Container Link in which there is text “Buy now” and a text icon arrow. The whole container link is a hyperlink. How do we edit this link? I don’t see any link in the right-side Properties pane. Can anyone give me a How-to on this. I'm sure it is staring at me and I am blinded by the new features.
TIA
Daniel