What is Sticky Header
Sticky Header is a very useful feature as user will always have main menu at the top of the page.
Sticky header is enabled by default. When user scroll down the page, it will automatically appear.
How to Enable / Disable sticky header
It can be enabled or disabled from theme settings. Navigate to:
Home >> Administration >> Appearance >> Settings (of PariPro theme)
domain.com/admin/appearance/settings/paripro
Under PariPro Theme Settings >> Header, you can enable or disable Sticky Menu.