Use the line height settings to control the distance between lines of text. We specify line height settings using the em unit. This is done to improve browser compatibility and enable people visiting your website to scale text up or down in size based on their web browser settings.
Line height settings are not applied to some elements of the theme such as the horizontal menu bars. This helps to keep elements constrained to a fixed size or shape and limits the risk of content being hidden from view.
If you want to apply your own line spacing settings to elements, the best method is to use custom CSS such as this:
#selectorName { line-height: 1.60em; }
It would be recommended that custom CSS code such as this code above is pasted into the Custom CSS box inside the page inspector.