-# A string is defined by beginning a line with an & character, which must
-# be immediately followed by a C identifier. A nonempty sequence of
-# whitespace (with at most one newline) separates the identifier from the
-# beginning of the string itself. This whitespace is never included in the
-# output.
+# Options may be used to alter the normal behaviour. An option is placed
+# on a line by itself beginning with an @ character, and may appear anywhere
+# in the input file. The following options are defined:
+#
+# @nozero
+# All strings will have a non-zero offset in the strtab.
+#
+# A string is defined by beginning a line with one or two & characters, which
+# must be immediately followed by a C identifier. Two & characters indicates
+# a string that should not be translated, as described below. A nonempty
+# sequence of whitespace (with at most one newline) separates the identifier
+# from the beginning of the string itself. This whitespace is never included
+# in the output.