To load two files at the time you start Merging from the command line, change to the directory in which the files are stored and specify the file names on the command line. To merge two files named file_1 and file_2, use the following command:
demo% twmerge file_1 file_2 & |
The first file listed appears in the left text pane; the second file appears in the right pane (see Figure 4-1).