Greetings! After quite a bit of try and try again I managed to find the precise element attributes I needed to use in ATO>CSS & HTML Inserts section to affect a specific post. The post is the newest one at [url="http://www.ezw123.com"[/URL]

However, the div, class and span elements I inserted into the post using Add Post and the HTML tab do not remain in the the code when I Publish it. Therefore, the additional styling I am trying to add as div's and classes in ATO>Add CSS is ignored.

These are the element attributes I saw in Firebug relating to this post:

id=post-232
class=post-232 post type-post status-publish format-standard hentry category-offthewall odd

So I tried to wrap the entire post text in a div called "ss" for basic formatting, and tried to use span class=phone around the phone number and span class=upper around the first sentence, as I was creating the post.

Then I added this code to ATO>Add HTML CSS Inserts>CSS Inserts:

}
div.post-232 post type-post status-publish format-standard hentry category-offthewall odd, #post-232, #ss{
font-family: Tahoma, Arial, Helvetica, sans-serif;
font-size: medium;
font-weight: bold;
text-align: center;
line-height: 20px;
background-color: #FFFFCC;
border: thin inset #000000;
padding: 15px;
margin: auto;
}
div.post-232 post type-post status-publish format-standard hentry category-offthewall odd, #post-232.phone{
font-family: Tahoma, Arial, Helvetica, sans-serif;
font-size: medium;
font-weight: bold;
color: #FF0000;
}
.upper {
text-transform: uppercase;
text-decoration: underline;
}

Firefox shows the CSS as I added it in ATO>Add CSS, but since none of the divs and classes I tried to add to the HTML remained, the only formatting that shows is on the div post itself.

I guess this was a drawn out way of asking - How do you add elements like div, class and span to the HTML text of a post?

Thanks for your help.

did you use the visual or html editor?

HTML editor....should I be able to add elements in HTML editor?

Yes you should, I just put a div in a post. Try disabling all your plugins

I tried disabling all the plug-ins, but elements I put in the post text are still not showing up. Could it have anything to do with the fact that I write the article/post in MS Word and then use the 'copy and paste from Word' option in the "Kitchen Sink" to insert the text? I add the elements after the basic text is inserted.

it shouldn't matter. If you are using the HTML editor, you should be able to put in the html into the post. To see if it is a theme issue swap to twenty-ten and try it.