Master copy of PSP?

[Shintaro]

Hi,
In Andrew Schulmans book "Undocumented DOS" there are several ways to access the master copy of the PSP, P.649 onwards
https://archive.org/details/undocdos2ed/page/649/mode/1up
What way do you guys use to access the DOS environmental settings?
Cheers.

[FORTRANS]

Hi,

   When I use the PSP, I usually use the program's PSP.  For simple
things there is no need to locate a master PSP.

   A quick search on the DOS environment turned up a need to locate
the program's location to access its configuration file.  And maybe
some macro files as well.  That program got a bit involved with some
customization.

Cheers,

Steve N.