If im not wrong that behaviour is added to Lectora 17.1
So you could make a non-responsive title, 1 view, that will fill the full view on landscape tablet and landscape mobile, thus making that easy. Im not 100% sure that will do what you need, but its easy enough to test.
Check the release notes here:
Especially these lines:
- New HTML publish option to disable browser resize of published content
- New publish option to scale content to fill the browser window