The ALL range further refines a general range specification.

 Format: [range] ALL 'string'

 While range can be a single, multiple, or compound range, the command
 being performed will only apply to those lines of text containing the
 given string. This string can be enclosed in single or double quotation
 marks.

 Ex: TYPE ALL 'EDT'          When ALL is used, the default for range is
                             WHOLE.  This command will type all the lines
                             in the current buffer containing the string
                             'EDT'.

     SUBS/A/B/50:100 ALL '1' Substitute B for A in all lines from 50 to
                             100 which include the string 1.