Administration > Environment Variables > APTLOADPATH — Specifying the Path Names for the set loadpath Option
  
APTLOADPATH — Specifying the Path Names for the set loadpath Option
Specifies the paths for the set loadpath option, which is the path list to directories that are searched by the require and source commands to load application files. The default is:
Arbortext-path\packages
main subdirectory of packages
tools subdirectory of packages
There are two symbolic parameters (%H and %D) that may be specified as part of the search path. These directories must be included in the path list (for example, using %D) to ensure proper Arbortext Editor functionality.
If you are implementing a custom script, use the Arbortext-path\custom\scripts directory to load it automatically upon startup.