Shows you the list of output files prepared to joining process. You may see input files count left of every output file name.
You can set new output file name using edit box and Set button above the output files list.
Use output file names setting in more setting marker when you want to rename all files at once.
You may use Drag and Drop method to move input files from one output file to another one.
The output file names are striked out in case this output file doesn't contain any input file. This output file will be ignored in output process.