You can also use &Nbsp to create an indent (just use as many as you want, and do not capitalize - I only did that so it would show up.
Also, < BLOCKQUOTE > (again, without the spaces).
There are large threads with the title HTML SandBox, that contain more than you'll ever use; pictures, strange, blinking fonts, colors, bold fonts, italics, etc.
P.S. Do a 'right-click', 'view source' to see the html tags in this post.