Filter is external console program, that UniRed can call, sending selected text to its standard input, and replacing the selected text by its standard output. For example, a filter can sort lines alphabetically, or do alny other text processing.
To call a filter select the necessary one in the list in the menu.
Filters are described in the file filters.ini. Each filter is described by one section of the ini-file: the name is in square brackets, next is the description itself.
There are parameters, describing a filter: