Slideshow in the headerbar

Hello!

I created a slideshow for the headerbar but I can't get the fixed background image (like the demo). Do I have to edit CSS code or is it something I can obtain via control panel?
Is there a way to change Slidewhow height? "Max height" doesn't seem to work.

Thanks.

Please read the docs at:
demo.joomlaplates.com/jp_advocat/docs/#headerbar

That's what I did, but the result is different from the demo.
I've just found out that the one in the demo is a "top-a" section with fixed background, not a roksprocket slider. I think it's not possible to have a slider with fixed background image.

Regards.

1.) The fixed background images are no slideshows
2.) The slideshow on headerbar can not be fixed