For each stylesheet you would like the user to be able to select, add a key starting with CSS and ending with a unique string (such as 1, 2, 3...).
While some stylesheets are provided with the product, if none of these exactly meet your needs, you are encouraged to make a copy of the closest one, modify the colors (and other style settings) and add the name of the file to your web.config file.
Note: if one or less css definitions are included in the web.config file, no stylesheet selection drop-down will be presented to the user while changing the emulator settings.
The format of the value for a CSS definition is:
CfgName;Description
Where:
CfgName= Name of the stylesheet (.css file) as it exists in the FVTerm folder
Description= Description of the stylesheet as viewed by the user in the client settings page