Look for:

/* font sizes */
.yafnet .smallfont	{ font-size: 7.5pt; }
.yafnet .largefont	{ font-size: 9pt; }

If it's just the body text of the posts you want to alter, look for:

.yafnet div.postdiv {
	width: 100%;
	min-height: 100px;
	overflow: auto;	
}

In the post editor there is a drop down for font size. It is by default at 5. How to change the default to 6?

Also keep in mind the post editor you are using to write your posts might not have been written by the YAF programmers, so changing the behavior within the post editor you are using (for example, to change the "default" from 5 to 6) might be out of scope for this forum's community but rather the authors of the specific post editor. YAF provides the ability to work with many editors, so maybe you should switch to one that provides the functionality you are seeking.

In this post, someone asked how to easily change the displayed font sizes, and my answer stands. At least, for the current version (1.9.3).

If you can't get it to work, provide some more details as to what version you're using, what theme you're using, and a link to your forum so we can see that you actually made the change correctly.

Not wrapped in yafnet class, just use

div.postdiv{

font-size:16px

}

This is at the very bottom of the theme.css file

The select dropdown for the font size only wraps the default font

with a modifier to increase or decrease the default font size.

The original fix in the theme.css mentioned above did affect the last post column in the post listings but did not affect the font size in the actual posts. The theme involved is so clean.

The adding a div.postdiv solution worked. Perhaps this was missing in the so clean theme?

Many thanks for all the help!

Oh yea I'm stuck on godaddy for another few months. The general solution for godaddy hosted problems is to move off of godaddy. I'll be doing that in a few months. The weird "we install this software for you to use but we don't support it nor do we give you the access privs you need to maintain it. Use it as is or blow" attitude/policy.

Hopefully godaddy will upgrade to the latest code install at some point.

/* font sizes */
.yafnet .smallfont	{ font-size: 7.5pt; }
.yafnet .largefont	{ font-size: 9pt; }

.yafnet div.postdiv {
	width: 100%;
	min-height: 100px;
	overflow: auto;	
}

It worked to me adjusting the second part:

.yafnet div.postdiv {
	width: 100%;
	min-height: 100px;
	overflow: auto;
        font-size: 10pt;
}

Thanks!