1. The "hanging" sticky header lets your main menu and logo to always be at the top of the screen.. 

2. The transparent sticky header can be enabled/disabled from the option Sticky Header Behaviour - found in the local page's Vamtam options below the text editor.

There are two options:

- Normal (select this option if you don't want the main menu to overlap the slider on the homepage)
- Over the page content (select this option for transparent sticky header)

To find the local page's Vamtam options click on "Edit page" and scroll below the content box:

3. Please note that the option "Sticky Header" found in Appearance > Customize > Header  > Sticky Header must be "ON" in order to have sticky header working.