Select a format in which to display data in the viewer then click various tabs to view the following:

• ASCII/EBCDIC - basic processing information.
  
• Binary header - which values appear at specific byte positions.
  
• Trace header - trace information. GeoSyn looks here for offsets, CDP intervals, and location.
  
• Trace data - the specific data readings.
  
• Histogram - the graphical display of frequency variation.
  
• Spectrum - the array of amplitude and frequency variations.

Select whether the file was saved in PC (ASCII) or mainframe (EBCDIC) format. 

Click to display the Edit EBCDIC Header dialog box and change SEGY values in the file.