Some of the operation of MM is controlled by variables. MM was designed with variables so that you could change some of the things it does to match your preferences.
To see a list of variables, use the show command. If you type just show, you will see a series of set commands that show each variable and its current setting. At the end, you also see define commands if you have created any mail-aliases with define.
MM>show set aliases-use-groups no set append-signature never set auto-startup-get yes set autowrap-column -7 set browse-clear-screen yes set browse-pause yes set check-interval 300 set clear-screen yes set continuous-check no set control-d-automatic-send no set control-e-editor yes set control-l-confirm no set control-n-abort ask set crt-filter /usr/ucb/more -d set default-bcc-list set default-cc-list set default-fcc-list set default-from set default-mail-type mbox set default-read-command next ...
If you type show ? with a question mark, you see a list of mail-aliases (if you created any) and variables without their values.
MM>show ? confirm with carriage return or mail alias, one of the following: or variable, one of the following: aliases-use-groups append-new-mail append-signature auto-create-files auto-startup-get autowrap-column browse-clear-screen browse-pause check-interval clear-screen continuous-check control-d-automatic-send control-e-editor control-l-confirm control-n-abort crt-filter default-bcc-list default-cc-list ...
Lastly, the show command can also be used to see the current setting of any specific variable.
MM>show aliases-use-groups set aliases-use-groups no MM>
For information about what any variable does, use the command help set and the name of a variable.
MM>help set aliases-use-groups SET ALIASES-USE-GROUPS NO/yes - whether to show mail-aliases in sent mail With the usual NO setting, if you use a mail-alias when you type in an address, it is changed in the outgoing mail to show the real addresses. If the mail-alias was for a list of addresses, the people receiving your mail will see who else got the message, and be able to send replies (or regular mail) to the other people. If you change it to YES, the people receiving your mail will see only the mail-alias in the address. This might be desirable if it is a long list of addresses that would appear as a very long header field. For more help, type "help" and one of the following: (at any prompt:) save-init set show define who
The variables all have what are called default settings. A default, in general, is the value of a variable in the absence of any specific instruction. If you have never changed any variables, all the values shown by show are the defaults.
The values are of two basic types:
To determine what values are possible, see the help screen (help set and the variable name), which describes the purpose of the variable. The help screen also states what the default is (the usual value), so that if you changed the variable, you can see how to change it back.