A Personal Configuration is similar to the VALD default configuration table. It contains references to all available line lists that can be included in the queries and ranking vector for each list. A Personal Configuration is created when a user submits the first request with 'personal configuration' option. It is simply copied from the default configuration and replicated to all VALD mirrors. At this point the user can edit it using a web form by clicking on the link 'Linelist configuration' from any request form. A fragment of the editor window is shown below.