From OpenSCADAWiki
The column "Configuration" allows to specify the link type of the widget attribute:
- Constant — in the tab of widget links the field for indication of a constant appears, for example, of the special color or header of the template frames.
- Input link — linkage with the dynamics for read-only.
- Output link — linkage with the dynamics just for writing.
- Full link — complete linkage with dynamic, read/write.
- From style — take the value from the project's style.