Each file list view may display a command line that lets executing shell commands in viewed folder. It also allows to supply a set of command line options. It is able to operate on selections in file list.
Command line formants
Each command line before being executed is parsed and special formants are replaced with expanded options. These formants are:
$$ $ character
$f selected files
$F number of selected files
$d current working directory
$u user name
$U user ID
$t ascii date + time
$T numeric timestamp
Not only command line...
$ formants are used not only by file list view command prompt. The same parsing rules are also applied to 'Run Command' dialog commands, launcher toolbar button commands, file type description actions and so on.