You can do this by adding a text object to the top of your page (at coordinates 0,0 is the safest), and then setting focus to that object. You can hide the text by making the text color white, or putting something on top of it. I believe it has to be "visible", though, so don't uncheck the Start Visible property. You can find the "focus on" block under the "Page category".
Here is what that action will look like: https://www.screencast.com/t/bdtsjSOAfXkX