How do I turn off the default menus? I have an idea on how to make custom ones.

/admin_layouts.php
select site navigation
check show or not

I guess I forgot to mention when a visitor visits the mainpage. the menus at homepage. top and bottom.

In Global Settings you can also add links in the footer.
 
And in Administration > Web Pages > Edit Page you can check " Show Link in Footer" to link to the page in the footer.
 
Viart is an adventure with so many discoveries to be had!!
 
Chris