Where to set the blank space between modules in the template?

Hello,
where I can set please the blank space dimension between the modules JEvents and the ACM Slideshow and ACM Features? (see the attached image).

Thanks in advance
Roberto

It is the padding-top and padding-bottom value for .t3-section .container

Try to change padding for both of them adding to your custom.css

.t3-section .container {
padding-top:20px!important;
padding-bottom:20px!important;
}

Change px values as you wish