A
Abbreviations--Allows you to create a window over an abbreviation you have used, to inform the reader what the abbreviation means.
Acronym--Allows you to create a window over an acronym you have used, to inform the reader what the acronym means.
Align Center--All of your copy is centered. Left- and right-hand margins are not aligned.
Align Full--Straightens copy so that both left- and right-hand margins are aligned.
Align Left--Your margin is straight on the left-hand side of the text.
Align Right--Your margin is straight on the right-hand side of the text.
B
Block Quote--The "Block Quote" option is used when you have a long quote, say of three sentences or more and you want to set it apart visually from the other writing in the text to make it easier to read and/or to make it stand out more. It will separate the quote in a nice little block of writing that looks different from the rest of the paragraph, and has a little extra space on all sides.
Bold--Your writing will be highlighted in boldface, like this.
C
Check Accessibility--This is used to evaluate content for accessibility issues. You enter a website page or post or upload an html file and it will check to see if there are any problems with the html code that is preventing access to the post, page or file.
Citation--Apparently it can italicize and add quotations to your text and put it in a box but I have no way of knowing for sure as mine doesn't work.
Clker Clip Art Gallery--Clip art at your fingertips. Click on this button, type the kind of artwork you want to see in the subject line ("apples", "fighting" etc.), and you will have a selection of clip art to choose from for your post or page.
Copy--Just another way of copying instead of pressing "Alt" + "c".
Cut--Can be used instead of "Alt" + "c".