#### 3.5.2.7 Displaying Information ¶

Mail command: = ¶

  Displays the current message number.

Mail command: headers [msglist] ¶
Mail command: h [msglist] ¶

  Lists the current pageful of headers.

Mail command: from [msglist] ¶
Mail command: f [msglist] ¶

  Lists the contents of ‘`From`’ headers for a given set of messages.

Mail command: z [arg] ¶

  Presents message headers in pagefuls as described for `headers` command. When arg is ‘`.`’, it is generally equivalent to `headers`. When arg is omitted or is ‘`+`’, the next pageful of headers is displayed. If arg is ‘`-`’, the previous pageful of headers is displayed. The latter two forms of `z` command may also take a numerical argument meaning the number of pages to skip before displaying the headers. For example:

      ? z +2

  will skip two pages of messages before displaying the header summary.

Mail command: size [msglist] ¶
Mail command: si [msglist] ¶

  Lists the message number and message size in bytes for each message in msglist.

Mail command: folders ¶

  Displays the value of `folder` variable.

Mail command: summary ¶
Mail command: su ¶

  Displays current mailbox summary. E.g.:

      ? summary
      "/var/spool/mail/gray": 23 messages 22 unread