.dv ex_start ^^.IP .br ^^.nf .br ^^.ft CW .br .nf
.dv ex_end .fo on .br ^^.ft P .br ^^.fi .br ^&space
+.dv proto_start .sp 1 .cc .5i .st 9 .sf Courier-bold .nf
+.dv proto_end .fo on .sf ^&text_font .st ^&text_size .sp .3
+
.** fonts and font macros
.dv ital \fI$1\fR
.dv bold \fB$1\fR