Some basic HTML and Markdown formatting in Steem.  Feel free to add your own.

<b>Empty Line</b>
HTML Format: &lt;br>

<b>Bold:</b>
HTML Format: &lt;b>something&lt;/b>
HTML Result: <b>something</b>
or
Markdown Format: \*\*something**
Markdown Result: **something**
Note, if you want two asterisk in front of a word, then put a slash in front of each asterisk \\\*\\\* to make text.

<b>Emphasized:</b>
HTML Format: &lt;em>This text is emphasized&lt;/em>
HTML Result: <em>This text is emphasized</em>
 or
Markdown Format: \*something*
Markdown Result: *something*
Note, if you want an asterisk in front of a word, then put a slash in front of each asterisk \\\* to make text.

<b>Headers:  </b>
HTML Format: &lt;h1>Introduction1&lt;/h1>
HTML Format: &lt;h2>Introduction2&lt;/h2>
HTML Results:
<h1>Introduction1</h1>
<h2>Introduction2</h2>
Markdown Format:   (Must start the line)
\# Introduction1
\## Introduction2
Markdown Results: 
# Introduction1
## Introduction2

<br>
<b>Quoting something:</b>
HTML Format: &lt;blockquote>This is a quote that you are distinguishing from your text.&lt;/blockquote>
HTML Results:<blockquote>This is a quote that you are distinguishing from your text.</blockquote>
Markdown Format: (Must start the line)
\> This is a quote that you are distinguishing from your text.
Markdown Results:
> This is a quote that you are distinguishing from your text.

<br>
<b>Links:</b>
HTML Format: &lt;a href="/@mctiller">Link to mctiller&lt;/a>
HTML Results: <a href="/@mctiller">Link to mctiller</a>
Markdown Format: \[Link to mctiller](/@mctiller).
Markdown Results:[Link to mctiller](/@mctiller).

<br>
<b>Images:</b>

HTML Format: 
&lt;img src="https://tse3.mm.bing.net/th?id=OIP.Mdceff51c4d9ec416b9185e635da4e5efo0&pid=15.1&P=0&w=326&h=105">
HTML Results:
<img src="https://tse3.mm.bing.net/th?id=OIP.Mdceff51c4d9ec416b9185e635da4e5efo0&pid=15.1&P=0&w=326&h=105">

Markdown Format: 
\![pubDomain]\(https://tse3.mm.bing.net/th?id=OIP.Mdceff51c4d9ec416b9185e635da4e5efo0&pid=15.1&P=0&w=326&h=105 "Public Domain")
Markdown Results:
![pubDomain](https://tse3.mm.bing.net/th?id=OIP.Mdceff51c4d9ec416b9185e635da4e5efo0&pid=15.1&P=0&w=326&h=105 "Public Domain")

<br>
<b>Image link:</b>  A image that is also a link

HTML Format: &lt;a href="https://images.search.yahoo.com">
  &lt;img src="https://tse3.mm.bing.net/th?id=OIP.Mdceff51c4d9ec416b9185e635da4e5efo0&pid=15.1&P=0&w=326&h=105">
&lt;/a>
HTML Results:   (Click on image)
<a href="https://images.search.yahoo.com">
  <img src="https://tse3.mm.bing.net/th?id=OIP.Mdceff51c4d9ec416b9185e635da4e5efo0&pid=15.1&P=0&w=326&h=105">
</a>

Markdown Format: 
\[\!\[PubDomain](https://tse3.mm.bing.net/th?id=OIP.Mdceff51c4d9ec416b9185e635da4e5efo0&pid=15.1&P=0&w=326&h=105)](https://images.search.yahoo.com)

Markdown Results:   (Click on image)
[![PubDomain](https://tse3.mm.bing.net/th?id=OIP.Mdceff51c4d9ec416b9185e635da4e5efo0&pid=15.1&P=0&w=326&h=105)](https://images.search.yahoo.com)

<br>
<b>Video:</b>  On Youtube, just right-click and "Copy Video URL"
Format:  
<p>https: //youtu.be/nanOevuxpdM</p>
Results:
https://youtu.be/nanOevuxpdM

<br>
<b>Table:</b>
HTML Format:
&lt;table style="width:100%">
  &lt;tr>&lt;td>Jack&lt;/td>&lt;td>Dumpty&lt;/td>&lt;td>53&lt;/td>&lt;/tr>
  &lt;tr>&lt;td>Jill&lt;/td>&lt;td>Dumpty&lt;/td>&lt;td>12&lt;/td>&lt;/tr>
&lt;/table>
HTML Results:
<table style="width:100%">
  <tr><td>Jack</td><td>Dumpty</td><td>53</td></tr>
  <tr><td>Jill</td><td>Hills</td><td>5</td></tr>
</table>
<br>
Markdown Format:

\| FName | LName | Age
\| ------------- |:-------------:| -----:
\|Jack | Dumpty | 53
\|Jill | Hills | 5

Markdown Results:
| FName | LName | Age
| ------------- |:-------------:| -----:
|Jack | Dumpty | 53
|Jill | Hills | 5