Each user has the possibility to create lists, that only he can edit and use. Furthermore, everyone can access public lists but without consultation for security reasons these cannot be edited.
Lists are automatically recommended if you are having difficulty learning individual lists or if you have created a new one.
Using the buttons 'New file' or 'Edit file' you get to the editor. 'Save' first checks the list's syntax, 'Force save' saves a file even with syntax errors.