The topics within a category are defined by the contents of a category definition file, such as the file Tmail.js, in the directory html\en\navigation. A category definition file is a JavaScript file that can be edited using any ASCII editor. The name of each category definition file is specified as the first parameter in an invocation of the JavaScript function category in a class definition file. The class definition files are described in Adding or removing categories of information.
Each line within a category definition file is one of:
To remove an existing topic you can either
If the topic has lower-level subtopics, these will also have to be removed using the same process.
To add a new topic, simply add a new line to the file containing an invocation of the JavaScript function topic. The three parameters to the function are