Compare directories                            Manual page 136
 This command compares the contents of the directories
 displayed in two panels.  Files found in one directory but
 not the other are marked.  Files that have been created or
 edited more recently in one than the other are also marked.
 If the two directories are identical, the Commander displays
 a message to that effect.

 To make two directories identical, use the Compare
 directories command, then press F5, Enter in each panel to
 copy the newer or unique files to the other directory.

   Marks:

     1. Files that have a more recent date than file in the
        other panel.

     2. Files that don't exist in the other panel.