If you need a custom font size, you can do it by changing the HTML source code.

To change the font size in your footer:

1. Edit the rule in Administration program.
2. Go to the built-in signature editor to edit the footer.
3. Choose one of the available font sizes.
4. Switch to HTML source view.
   1. In the editor of CodeTwo Exchange Rules 2.x or CodeTwo Exchange Rules 2007 1.x, click the HTML button at the bottom of the window.
   2. In the editor of CodeTwo Exchange Rules 3.x, CodeTwo Exchange Rules 2007 2.x or CodeTwo Exchange Rules 2010, click the HTML button in the left top corner and choose Source.
5. In the html template find the tags at the beginning of the formatted text (e.g. <P> or <FONT>). If they contain a string like style="font-family:Arial; font-size: 12px",  you just need to change the value next to the font-size. If there is no such string in the tag, add it. The size units are px - pixels or pt - points.
6. Save the changes.

This is an example of an HTML tag with a changed font size (in red):
<span style="font-family:Trebuchet MS; font-size: 21px">