Easy approach to edit container patterns [PickMaster 3]

I am using quite a few containers in my different projects and it is time consuming to go through each and every container and define various patterns.

The pattern used in containers can be exported/imported. The file used for export/import is a plain text file. Thus, it is easy to let any suitable program generate a text file with the positions and then import them to PickMaster. By creating a very simple pattern and export it from PickMaster it is easy to determine what format the file must follow.