Setting Defaults

Each module in Divi can have defaults set that will impact all modules on the site, you can also create pre-sets that allow you to have multiple styles of any given module. 

To set the defaults for a module (Text Module for example) click the small arrow next to Default at the top of the box.

Hover over "Text Default Preset"

Click on the second icon from the right

Confirm your choice to replace all of this kind of module with these settings.

Creating additional/multiple defaults

Alternatively you can create a new set of defaults, this is a safer option and you can manually change each module to this setting by selecting the pre-set from the dropdown at the top of each module.