Long story short, the line height feature you’re referring to isn’t something that we have at the moment.
In the old editor when you changed text size, it adjusted the line height to match it - but we received some feedback from customers prompting us to update this feature, so we adjusted it with the launch of the new editor.
For what it’s worth, this has been brought up to our team that’s working on the text editor and we’re considering doing a bit of both where it automatically updates unless you manually set the line height yourself - this is still down the road, but feedback like this definitely increases priority.
In the meantime, if you’re willing to get your hands dirty in a bit of custom CSS, you can alter your line-height manually:
I’ll use h1 tags as an example:
If you need some more instructions with that, don't hesitate to reach out. We've got lots of awesome developers to call upon in here :relaxed: