All wiki rules you have to remember:
Use [[A page title]] to link pages
That's all ;-). Happy Wiki Wiki Web!
If you are outside WikiWiki world:
- Enter [[A new page title]] anywhere on page you are editing
- Click Save
- Click new link "A new page title" that is rendered in red
- Edit new Page
And ... You have just one more page linked to another page. Voila!
Menu & sidebars
In order to alter menu & sidebars find them using "search" with empty search string:
Click on them and click "edit" - you can alter menu & sidebars then. Extremely simple IMHO ;-)