Basic html

for bolded words

<b>text here</b>

for underlined words

<u>text here</u>

for italicized words

<i>text here</i>

for words that strikeout

<s>text here</s>

_subscript text

_text

^supscript text

^{text here}

overline
<span style="text-decoration: overline">TEXT</span>

under and overline
<span style="text-decoration: overline"><u>TEXT</u></span>

change the color of your text 
<font color="COLOR">TEXT</font>

highlight your text
<span style="background-color: COLOR">TEXT</span>

center your text

<center>text</center>

to skip to the next line
just add the code after the line

text<br>text<br>

change font sizes

<font size="NUMBER"> TEXT </font>

change the part that says NUMBER to one of these

1 2 3 4 5 6 7

changing font color

<font color="COLOR HERE">TEXT HERE</font>

changing font face/type

<font face=type of font here>textttt</font>
change the "type of font" to w/e type of font you want

script
arial
tahoma
times new roman
terminal
verdana

make a link
<A HREF="URL">CLICKHERE</A>

make a picture a link
<A HREF="URL">..</A>

bulleted list

• one
• two
  <ul><li>ONE</li><li>TWO</li><li>THREE</li>

box around text