VERIFY_3D reads the output file of the program ENVIRONMENTS and a 3D-1D scoring table. It creates a profile and plots the average 3D-1D score within a window as a function of sequence position. The plot is written to the output file. The GCG version of VERIFY_3D makes a plot using the GCG graphics libraries. It will ask for the following: 1) The ENVIRONMENTS output file 2) A file containing the 3D-1D scoring table 3) A file name for the output plot data. The output file lists first the 3D-1D score and the sum at each position. Then the average 3D-1D score within the chosen window at each position. 4) A window size for the average 3D-1D score.