Sticky header and main menu

Travelify
1

Hi,
how can i make the header and the main menu “sticky”?
Is it possibile with Travelify?
Thank you very much.
Bye.

2

Unfortunately, it is not possible via Theme Options and you will have to get your hands dirty by coding your own solution for this.

3

Ok, thank you.
How can I do it? Can you show me tge steps?
Thanks.
Bye.