There are two main features in Hype that can help with changing content to best fit different browsers/devices:
Responsive Layouts - have entirely different content that is shown based on “breakpoints” of width
Flexible Layout - Adjust element positions and sizes based on the browser (or container) width and height.
Note there are also ways to change the Scene Size in the Scene Inspector and mobile viewport options in the Document Inspector.
A couple other notes:
- Your title shows you are on version 3.0.2, but the latest is 3.6.3 and is a free upgrade. You can download from here or update via Mac App Store if that’s where you got it.
- If you intend to share your site, unless it is integrated into another page, I would recommend attaching a zip of the .hype document.