Inserting Extra Tags into the HTML <head> Element
You can insert JavaScript libraries and stylesheets into the <head> element of a shell. The valid HTML tags are <link>, <meta>, <script>, and <style>.
To insert into the HTML <head> element
1. As system administrator: Administration Dashboard > User Interface > Shell Administration.
2. To modify a shell, click the Tools icon 
and then click Properties. 3. In the Extra Tags for HTML <head> field, type the HTML tags that add custom code to the shell. For example:
<link href="default.css" rel="stylesheet" type="text/css"
4. Click Save.
