XF 1.5 Add background image in the header

[TheJackpot]

Hi, i'm using UI.X and i'd add an image in the header.
Which code should i use?
I contacted Audentio and the suggest to use the backstretch image, but i have no idea how..
Can you help me? Thank you

If you need: dronexp.it

 

[Paul B]

https://xenforo.com/community/threads/where-to-obtain-support-for-third-party-styles.92673/