Tree Editor TrEd
You can install TrEd from the author's web page.
After the installation TrEd will ask you to choose additional packages. You need the "Prague Dependency Treebank 2.0 Annotation", "PDT-ValLex Editor" and "Prague English Treebank Annotation" packages to browse the PEDT 1.0 data. All PEDT macros currently available are listed and shortly described in this document.