thankf ro the log in info. You can create a file using a simple text editor for custom css and name it using this format: templatefolder-custom.css (e.g., rt_spectral-custom.css). For this issue add this to the custom CSS file.menu-samples #rt-mainbody {background: transparent;}
More Info here:
www.gantry-framework.org/documentation/j...custom_stylesheet.md