The ADFviewer Extract Subset window has four sections, from top to bottom.

First is a section titled "Directions" containing three radio buttons, labeled "I-subset", "J-subset", and "K-subset".

Next is the "CGNS Input" section, with three text input boxes, labeled "Filename", "Base Index", and "Zone Index". At the right of the first box is a "Browse" button. At the right of the other two text boxes are check boxes labeled "default" and "all zones", respectively.

The third section is the "CGNS Output" section, with two text input boxes, labeled "Filename" and "Base Name". To the right of the first box is a "Browse" button, and to the right of the second box is a check box labeled "default".

The last section is titled "Averaging", with two radio buttons, labeled "Simple Averaging" and "Volume Weighting".

At the bottom of the window are "Accept" and "Cancel" buttons.