To edit or add to the Main file, for example, select the [Edit] button corresponding to it under DISCO Services. Make changes and then generate a new DISCO Main file by clicking on the [Generate DISCO file] button at the bottom of the page. Replace your old file in your resource's root directory with the new one.
In general, where there is a [View] button you may view script information and where there is an [Edit] button, you may edit.
You may view, change or set your crawl frequency, although you will need an account to do this.
For more information, please contact the NIF interoperability team.