| Track | Selects the track that contains the logs to sum together. | 
                                                            
                                                                | Disable This Track  | Disables the log summation for the currently selected track.  With this option selected, logs will plot as usual, but the settings on the Lith Sum tab are retained. | 
                                                            
                                                                | Disable for All Tracks | Disables the log summation for all tracks.  With this option selected, logs will plot as usual, but the settings on the Lith Sum tab are retained. | 
                                                            
                                                                |  Available Curves In this Track | Displays all curves for the currently selected track. | 
                                                            
                                                                | Sum Curves in Track in the Following Order | Sums the two logs together to reflect a cumulative value. |