Okay, before I begin, I would like to say a few things.
1) I know there are too many of these, but all of the codes are scattered between the blogs. I'm doing this to provide a little order.
2) The codes are the same for groups; just use the basic codes which also work in messages. (This was confirmed by my friend, the always grumpy, DragonXblack.)
I might write a blog for editing groups, anyway.
3) I was rather surprised to find my last blog had over 100 views.
That is all.

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Border codes:

Basic border code:
[ style ]TD{border:color goes here style of border goes here number for the pixel width of border goes herepx;}[ / style ]

Here are the different types of styles for the borders:
outset
dotted
dashed
solid
ridged
inset
groove
hidden (this hides the border)

For the border width, you simply type a number in front of "px". As you can see, I have a solid, red border with a width of three (3) pixels.

You can replace "TD" with "a" to affect links or "img" to affect images.

Just like in the last blog, you can use these to put borders around specific sections by placing them before "TD":

.comments (for the comments section)
.profile (for the profile section)
.blogs (for the blogs section)
.admin (for the admin rights section)
.biography (for the biography section)

! The section... thingy must be seperated from the "TD", "a", or "img" with a SPACE !

You can replace "TD" with these to affect their corresponding sections:

TBODY (for the badges section)
DIV.navbar ( for the banner at the top of the page that says," Welcome, [Member]."
TD.title (for the title that heads each section)

! Don't forget to remove the spaces from within the brackets !

brackets→ [ ]

I can't write more; there's a text limit.