How to make navigation bar sticky i.e. fixed to the top when you scroll

[ Not working when logout of admin ]

Install this plugin:

Sticky Menu (or Anything!) on Scroll
By Mark Senff

Then, follow his instructions here:

https://www.wpbeginner.com/wp-themes/how-to-create-a-sticky-floating-navigation-menu-in-wordpress/

Below, I describe what I did.

Open your page and inspect source. Look the the div of the navigation bar.

In my case it is as shown below:

Copy the class and paste it in the settings for the plugin:

Since it is a class, you need to put a .  in front.  If it is an id, put a # prefix.

Test