Markdown is a great approach to writing your web page content. Within a single stack you can add Headers, paragraphs, links, quotes, lists, images etc. You can read more about Markdown (and the required syntax) here.
The Source Markdown stack allows you to change the colour, size and alignment of any text added to the stack. You can also style any dividing lines (achieved by typing either
---- into the Markdown stack) by adjusting their width, height and alignment.
If you need to over-ride the bottom margins (that are applied to headers and paragraphs as default) then you can do so by selecting the appropriate option and entering in the desired margin sizes.