Do you mean the page id?
(also visible with text 'wiki:syntax' in the screenshot at
https://www.dokuwiki.org/template:bootstrap3)
You could show/hide this by setting from the configuration manager: 'showPageId' setting.
Otherwise I have not yet an idea what you mean. Maybe:
https://www.dokuwiki.org/config:breadcrumbs
or
https://www.dokuwiki.org/config:youarehere
If I guessed wrong, please share a screenshot of your situation.