I wrote this post to accumulate some useful information about how Discourse treats HTML. These are the answers found or contributed so far:
This code: <p style="font-size:23pt">Paragraph text</p>
Paragraph textDiscourse honored the tag, but it Ignored the style attribute. So far has ignored every attempt I've made to us it with any HTML tag.
This code: The<br>break<br>tag<br>works
<b>The bold tag works.</b> = The bold tag seems to work.
<i>The italic tag works.</i> = The italic tag works
HTML Tables work
- item 1
- item 2
- item 3
There seems no way to change font color.
Still looking for font size adjustments.
This link provided by @slivingston was a big help with Discourse and Markdown.
The difference between a “back tick” and a single quote that look alike tripped me up for awhile. Dumb to miss that distinction. But at least for me, easy to do.
But only the back tick allows you to type HTML code as text, i.e. keep discourse from interpreting the tag in stead of just rendering it’s contents.