Add: Add the range of files between Start and End to the list of files to load.  They will be added to the Input File List.  For example if you only want to load the fifth file, set the Start and End to 5 and hit the Add button.  To load files three through six and nine through twelve set the Start to 3, the End to 6 and hit Add.  Then set the Start to 9 and End to 12 and hit the Add button again. Note: Often it is easier to add a range of files to the list and just remove the ones you don't want.  In the previous example you would set the Start to 3, the End to 12 and hit Add.  Then select files 7 and 8 from the list and hit the Remove button.

Input File List: This is the list of raw 2D SEG-Y files.

Remove All: Remove all the files from the Input File List.

Remove: Remove only the selected (highlighted) files from the Input File List.