I’m trying to set up a responsive prototype, and it’s rather glitchy in desktop app. Often, when I click a navigation item, the next page loads smaller, with the previous page apparently visible at full-screen in background. That’s problem #1

Looking at suggestions online, there were a set of steps, found here

But, I’m finding there is no “Shortcut” icon, or “properties”… I click on the question mark icon at the bottom right corner of the app, and it shows nothing relevant. Just Help, support, youtube, release notes, legal, feedback, community, contact support and pick a language.

I also tried pressing control / shift / ? and nothing happens. I’m on a Mac