To access administration, go to Home Page and, on the Menu, click on "Admin (click!)".
You will access the Sections Tiki Admin Panel (see Admin Panels ), as shown in this graphics:
From the Tiki Admin Panel, click the Articles icon to display the Articles setup panel, the top of which appears like so:
You can select here if the rankings and comments features are enabled for articles and submissions. You can also select the maximum number of articles to display in the articles home page.