Editing the Wiki

Categories

List of all categories: Special:Categories

All pages should belong to at least one category

There is a single top-level category Category:Contents that you can descend through to find something appropriate

Adding a Category

Add to the bottom of a page: [[Category:Foo]]

Or there's a blue square button with a C on the right in the wiki text editor

Creating a Category

Create a page named Category:Foo

Categories can be members of other categories, this will create a tree structure

Link to a Category with [[:Category:Foo]]

Templates

List of all templates: Special:PrefixIndex/Template:

Adding a Template

Add to the page: {{Template:Foo}}

(This can be used to include the contents of any page, the `Template:` prefix is just a convention)

Creating a Template

Create a page named Template:Foo

The Template:Color box template can be used within another template to create a coloured box

See template documentation at [1]

Watching Pages

There is a 'Watch this page' checkbox when you edit a page - does this do anything?

Adding New Users

Special:CreateAccount

Merging Pages

https://en.wikipedia.org/wiki/Wikipedia:Merging#How_to_merge