My point was that you can create your own toolsevent Event, and place the link anywhere in the template:
https://www.dokuwiki.org/plugin:ckgedit#page_tools_method
But maybe I misunderstood your question, since 'user' was ambiguous. But if you mean an ordinary user, who is going to place this link or button at the browser level, then I think the only way to do this is to give your user a set of alternatives and place these toolsevents in your template, each with a different EVENT_NAME, and when the user chooses, save the choice in a cookie and enable the toolsevent matching the cookie.