Hello, @antongschaffer,
The description you are talking about is the instruction when you use the Porto template builder to build your own Custom Blog Archive page, it is under Porto >> Template Builder >> Archive Builder.
You can use these options from there as well by editing the elements from there, and that will override the theme options.
Please refer to our theme documentation here: https://www.portotheme.com/wordpress/porto/documentation/archive-builder/
We hope it helps.
Best Regards,
PThemes Team.