.xlower
.style headers 7,0
.hd
.t Sample Preliminary Requirements
.st
.d
.spr 0
.ap
.lm 5
.! Index cross-references
.y Piece file >see PCFIL
.y Marker file >see MARFL
.y Graphics Editor > See GED
.y Stamp Editor > See STED
.y Piece Editor > See PED

.hl 1 Introduction

 This is an introduction.

.x MPLOT
.ch MPLOT
 This chapter describes the MPLOT program.
I won't bore you with more details.
.x MCHAR
This sentence mentions the MCHAR file, and is used to illustrate indexing.
.x PBOX
Ditto for PBOX.

.x PED
.ch PED
 Define PED program.
.x DESIGN
 Mention DESIGN program.

.hl 1 The PED Command Line

.hl 1 The PED Display

.hl 1 PED Commands

.x STED
.ch STED
 Define STED program.

.hl 1 The STED Display

.hl 1 STED Commands