Display different versions of your seismic data without leaving the Seismic window. You can change your version the following ways:
The Choose Version dialog box opens. Select the version you wish to display and click <OK>.
New versions are created in two ways:
Each version of your data is assigned a different file extension. See Version Names for SEG-Y Data for details on file naming conventions. The version with the highest extension number is displayed by default.
.YD0 is the original SEG-Y version you imported with the WinPICS Import Wizard.
.YD1 is the first filtered seismic line.
.YD2 is the second filtered seismic line, etc.