HTML Tags

How to make a blog post more beautiful? The visual editor of blogspot is very uncomfortable. So I decide to learn about HTML language. I think HTML is very simple.You can learn HTML according to some online documents.
I list some abbrev that confusing me last night. I wish it will help you.

Names	Description
a	achor
br	forced line break
dd	definition description
div	generic language/style container
dl	definition list
dt	definition term
hr	horizontal rule
h1~h6	heading
li	list item
ol	ordered list
p	paragraph
pre	preformatted text
td	table data cell
th	table header cell
tr	table row
ul	unordered list