loading all text files from a directory tree
Click the Open button, or press CTRL+O, then select a directory.
All TEXT files from this directory, including all subdirectories, are loaded.
TEXT means pure ASCII text, NOT MS Word .doc or other binary file formats.
If you want to define in further detail which files to load and which not,
read on here how to define a fileset.
Next chapter: Basic Search Within Many Text Files.