In Open Utilities Substation what does the "save settings" command actually save? is there a list that users can refer to see which customizations are stored in which file? (upf, ucf, or dgnlib)

In Open Utilities Substation what does the "save settings" command actually save? is there a list that users can refer to see which customizations are stored in which file? (upf, ucf, or dgnlib)

Some users are under the impression that using save settings will save toolbar locations, interface layouts, and such. Instead of drawing specific settings.