• When this template is transcluded, the texts within square brackets will either not appear or be replaced accordingly.
{{Collapsible lists option
| expandedname =  <!--(see below)-->
| listnames = 
| example =       <!--(one of the listnames)-->
| default =       <!--("all" or a listname, if either set to be shown)-->
}}

Parameters expandedname, example and default are optional. If the template featuring the collapsible lists already makes use of its first unnamed parameter – see, for example, {{Labor}} – use |expandedname=required with {{Collapsible list option}} (i.e. {{Collapsible lists option |expandedname=required |…}}) to suppress the "or, if enabled, …" portions of the text above.