Just found this useful info also from this thread http://www.daz3d.com/forums/viewthread/30492/P15:
So here is a sneak peak from the up coming User Guide for DAZ Studio:
Knowledge Base Article: https://helpdaz.zendesk.com/entries/22468709-DAZ-Studio-User-Guide-Sneak-Peak-Lighting
Just so there is no confusion, the User Guide isn’t a Knowledge Base article, it is an actual .pdf manual. Some of the hyperlinks in the text may not work since they refer to other chapters in the document that aren’t included in the sneak peak.