Template:Collapsible sections option

How to manage this template's collapsible groups/sections option

• This template includes collapsible groups/sections. When it first appears, one of these groups/sections may be set to be visible ("expanded") while the others remain hidden ("collapsed") apart from their titlebars. To achieve this, include the parameter |name where name is one of the following names identifying the groups/sections (omit any speech or quote marks):
• {{{list}}}

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Add categories to the /doc subpage. Subpages of this template.