Hi there, I'm new with gantry5 and I want to have a gallery on my site with a slider. I want to show some photos and have them change every 5000sec. I use the slideshow particule on starup theme, but I can't find a way to make it smaller. I want to have a height of 400px. I'm using the particle on prebottom (base outline) and right now it has more than 2000px height.