Re: Template Trick - Hello John version 5X
Yes, it shows the name of the registered user who's viewing the page. But this goes in a template (.tpl) file (found in tiki_root/templates/), not in a wiki page. See http://themes.tikiwiki.org/template tricks for other code that can be used in template files.
For wiki pages, try these: http://doc.tikiwiki.org/Advanced+Wiki+Syntax+usage+examples#How_to_display_URL_param_in_a_page_or_the_page_name_or_the_user_name .
-- Gary