search paths for files?

How do I add folders to a search path list where I have units saved for my WEB Core app?

The only thing I can find is in project options -> TMS WEB -> Compile where there's a line TMS WEB Source Paths.

It doesn't seem to make any difference.

All I can do is add files to the project to get the compiler to find them, and they seem to need to be in the current folder to ensure they get compiled properly.

Am I missing something?

It is here: