For each existing project option, Patcher also has a fallback user
option with a default value that would be shared among all projects not
setting the option explicitly. The name of the fallback is obtained by
replacing the colon in the project option's name with the prefix
patcher-default-. For example, the fallback corresponding to the
:to-address project option is named
patcher-default-to-address.
The :inheritance project option is also special in the sense that
it doesn't have a corresponding fallback. We will encounter other
exceptions later in this manual.
In the remainder of this manual, we will rarely mention the fallbacks again. When we introduce a new project option, just remember that it always has a corresponding fallback (well, not always, as you just discovered).