It all depends on the structure of the site.
- Create a template
- Write the directive in the template
[*content*]
- Create an article, specify the newly created as a template
- Set the publish option
The article can be addressed in 2 ways, by id and by alia. Alias is specified in article publishing settings.
http://yoursite.kz ?id=23 или http://yoursite.kz/mymat-alias-bla
If you use the option with aliases, then in the site configuration you need to give permission to this option. If the site does not have a dynamic menu, then boldly create a template and place the menu with the link that I described above there
PS Considered an option for Modx Evo. And not bad to see the site