Pages in Instiki can be grouped into categories. To assign a page to a category, add a line
to the page. You can assign the page to multiple (comma-separated) categories
Conventionally, this line is put at the bottom of the page (as on this one), creating a clickable link to the list of pages in that category.
Alternatively, you can “hide” a page’s category by prepending a colon
In that case, no visible link is created, so it really doesn’t matter where you place the line.
There is one special category
This creates an S5 slideshow.