customizing navbar position

[4evermaat]

Notice the navbar at the bottom ("please email support@...."). It scrolls automatically and is forced to the bottom of the visible page. I looked at the navbar shortcode docs and I do not see how to set the alignment of the entire navbar to be at top of page, side of page (vertical), bottom of page, etc. How to have multiple navbars if needed? (how to set the order of precedence)

Or not have any navigation components show up. Or customize which navigation links show up (hide some)?

How to have navbar only scroll to a certain point, and then anchor itself at that point in a page? But if the user reverses the scroll, then the navbar follows the user in the reverse direction.

How do I customize the background color of the navbars?