There's an undocumented Delphi 8 Project Settings Persistence File. It's known as DefProject.bdsproj. It's located in Documents and Settings\<User Name>\My Documents\Borland Studio Projects.
Normally, this file doesn't exist, and so, you create projects happily, without knowing that the IDE checks for the existence of this file.
DefProject.bdsproj comes into existence as soon as you click the “Default” checkbox in Project Options.
The next time you create a new project, Delphi 8 takes the settings found in DefProject.bdsproj, and applies it to your new project.
Isn't it alright then? Well, IMHO, it is, if the existence of the file is documented. The fact is, it's not. So, I was having problems with a new project until I managed to track down the existence of this file and destroyed it off with a photon torpedo.
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes