PDM Quick Search Match search term in, options

PDM 2020 SP5 Is there any information how these options highlighted in yellow work or what they do? Below the "Search Variables In" I also have "Match search term in..." options which are "Single variable/configuration" or "All variables/configurations". I have not found anything about these help, What's New, User Guides, or blogs for PDM 2020 or 2021.