This PSD file will demo the Paragraph Tag specifically with Line Height. This tag will allow you to render text ranges in your Label or Paragraph text layers. Line Height works very differently in Photoshop vs. HTML, you can use this PSD as a reference to understand how various types of font styles mixed with Line Heights will apply.
This PSD shows support for Justification, Character Styles, Paragraph and Label text in your design with multiple layer styles applied to each. Text are converted as native elements in most environments, but not all environments are created equal. We strongly suggest you test this PSD in different browsers to understand how text is rendered in each.