Click the "Slides" button at the bottom of the wiki page.
See this page: http://tikiwiki.org/Presentation20050319Crisol_Argentina
From this normal looking Tiki page (central and right columns in wiki view mode)...
...when you click on the slides button, you can see it in the slides presentation mode (showing slide 2 in this screenshot):
Slides add automatic links to previous and next slides, home slide and edit page link. Moreover, the slides allow shadowing when the mouse pointer is over items in a bulleted or ordered list. The color of the shadow can be changed in the .css file selected in the settings as admin.