more information on this option, *Note Reverting: (xemacs)Reverting.
When you save a file in Emacs, it destroys its old contents. However,
-if you set the variable MAKE-BACKUP-FILES to non-NIL i.e. `t', Emacs
+if you set the variable MAKE-BACKUP-FILES to non-`nil' i.e. `t', Emacs
will create a "backup" file. Select the Describe variable option from
the Help menu and look at the documentation for this variable. Its
default value should be `t'. However, if its not then use `M-x
of the text they are searching, i.e. if you are searching for "String",
then "string" will also be one of the selections. If you want a case
sensitive search select the Case Sensitive Search from the Option menu.
-You can also set the variable CASE-FOLD-SEARCH to NIL for making
+You can also set the variable CASE-FOLD-SEARCH to `nil' for making
searches case-sensitive. For information on setting variables, *Note
Setting Variables::. The two commands for searching for strings in
XEmacs are: