Hello Johannes,

to stretch it full width is easy - you just need to specify the content width of the section in its options:

https://prnt.sc/6pF4cVFjZBIL

to reduce its height you can specify in customizer -> additional CSS

.full figure.has-parallax {
    height: 100vh;
}

just decrease the height in view port units for example 80vh and add the code to customizer -> additional CSS

If you want just for this specific parallax image add a css class to its container and then

.my-class .full figure.has-parallax {     

      height: 100vh; 

}

Hello Johannes, trouble was mainly with image, it was to short in width for full width.

So plz resize your image and set the container section as full width in its options.

to decrease the parallax viewport use for example 70vh instead of 100vh

figure.has-parallax {
  max-height: 70vh;
}

in customizer -> additional CSS

https://www.moregraphics.at/portfolio-test/