If you created default masks during model definition, these masks will automatically already have the required default functionality to query data, to edit data or to delete data. If you want to use or change this functionality in your applications, you should know the most important default function sequences within a mask. To understand that the interoperation of installed functions (NoSelect, Select or Edit functions via -> Mask menus, -> Push-buttons in masks or -> Events), -> Mask states and -> Mask triggers is important. The following functions in masks are of special importance: