I want to use HTML on my Yahoo 360 site to dress it up and well, just play around a bit; it has some basic?

rules for which tags you can use... but, there is no syntax outlined and evidently it works because I tried a couple of easy ones: br and it worked. So if anyone can give me some examples, say to change fonts or make boxes or other things that are allow on the site. Please answer this with some lines of code.