bb_read

Reads messages in a specified range. bb with an argument (eg, "bb 1-3")
is a shortcut for "bb read", except that for historical reasons,  
"bb all" maps to "bb read = new" not "bb read = all"

Syntax:
  bb read = 20  (read message 20)
  bb 20         (same)
  bb read = #foo : 20  (read message 20 on board #foo)
  bb #foo = 20  (same)