Most of the options in Greenshift can be device-related and you can have different values for each resolution. You can also set your own breakpoints in General Settings
Please note, that if you want to change the option, you need to click on the device icon near the option or in the panel. The device preview icon in the top toolbar is only for Preview and not for the switcher of the responsive option.
You can also hide blocks related to the device in Advanced – Responsive and custom CSS.
Hiding block will use CSS display:none option. if you need to remove whole block physically from the page, then you need to use Visibility option
Inheritance
All options are inherited. For example, if you set a general option for size, all below devices will use it. If you set the option for Tablet, all devices below the tablet will use it.