More Formatting Options

I'd love to see more formatting options for resources.

As an example, the current "Tight, Normal, Loose" settings for line height seem ambiguous. I often find "loose" often to be too tight. And it can vary from resource to resource.

Same with margins, I'd love to be able to add more whitespace in the margins to frame up the text, both on desktop and mobile.

For an example of a good implementation on mobile, BookFusion does a great job with this.