Board Thread:Support Requests - Getting Technical/@comment-4989681-20171126000728/@comment-32354545-20171127015328

No, no /sandbox page exists by default, but it is the most common and sensible place to create one. You can create a subpage of your userpage by any name. You do not need to be an admin.

If your Template:Documentation does not contain a link to a /sandbox page, you may update it to the newer version at c:starter:Template:Documentation.