.left margin
.ifnot hlp
.hl 1 Chapter/Appendix Formatting
.endif hlp
.left margin +5
.helpc CHAPTER
.q  _.CHAPTER  [;][title]
.qq  _.CH [;][title]  
.skip 
.index  CHAPTER  
indicates the beginning of a chapter with the
specified title.  Successive .CHAPTER commands number the following
chapters sequentially.
.ifnot small
The title can contain escape sequences. Tabs within the title are treated as
ordinary spaces.
This command declares the layout to be chapter oriented, which has
effects on the page numbers and the section headers. The effect of this
command is as if the following command string were entered: 
.skip 
.I5;_.NO HEADER _.PAGE SIZE _.PAGE
.I5;_.FIGURE 12 _.CENTER; CHAPTER n
.skip 
and n is incremented by 1 automatically. 

After a "CHAPTER  n", the following commands are performed:
.skip 
.I5;_.BLANK 2 _.CENTER; title
.i5;_.BLANK 3 _.TITLE title
.i5;_.FILL _.HEADER _.SUBTITLE 
.if hlp
.if rsx .i5;ADDITIONAL HELP AVAILABLE: result STYLE
.endif rsx
.endif hlp
.HELPD RESULT
.skip 
The resulting chapter heading will have a centered title and chapter number.
The chapters of this document are an example of the chapter format.
All special printer features_* are turned off, and underlining is turned off
at the beginning of the chapter and after the chapter title.
.ifnot hlp .footnote
.i-2;_*#Special features are only turned off if the appropriate escape
sequences are defined as LCK.
.end footnote
.endif hlp
In addition the case, margins, spacing, and justify/fill modes are reset,
any subtitles are cleared, and the chapter name is set to the title.
The title will appear in CAPS unless it contains a shift down (_\_\).
If the _.NO AUTOTITLE or _.NO TITLE command is used, the page title will not
automatically be the same as the chapter title. To control the margins and
spacing, use the _.PAGE SIZE command to set the permanent margins and
spacing before the _.CHAPTER command is executed. 
.p; It is possible to reformat the chapters with the _.STYLE CHAPTER command. 
Chapter numbers can be selected to be letters or Roman numerals with the
_.DISPLAY CHAPTER command. In addition, the _.DISPLAY CHAPTER command can
be used to
change the word "CHAPTER" to another word, or just blank space. _.DISPLAY
CHAPTER can underline chapter titles, or use bolding on printers that support
this feature. The STYLE and DISPLAY commands, when used together, can
completely alter the chapter header. 
.helpd STYLE
.endif small
.q  _.STYLE CHAPTER [n1],[-n2],[-n3],[-n4],[-n5]
.qq _.STCH [n1],[-n2],[-n3],[-n4],[-n5]
.S.x STYLE> CHAPTER
changes the style of the chapter and appendix headers.
.list 0
.le;n1#=#Number of lines to skip before the word CHAPTER.
.le;n2#=#Number of lines to skip after the word CHAPTER.
If n2=-1, the title and the word CHAPTER will appear on the same line.
.le;n3#=#Number of lines between the title and text.
If n3=-1, the title and any following text will be placed on the same line.
.le;n4#=#Number of spaces to indent the word CHAPTER.
.le;n5#=#Number of spaces to indent the title.
If n4 or n5 are -1, the line will be centered.
If n4 or n5 are -2, the line will be right justified.
.els 0
.i5;DEFAULT: _.STYLE CHAPTER 12,1,3,-1,-1.
.i5;(Not available in DSR)
.helpc APPENDIX
.br
.q  _.APPENDIX  [;][title]  
.qq _.AX [;][title]
.s.x APPENDIX  
indicates the start of an appendix with the specified title.
Successive _.APPENDIX commands assign identifying
letters in alphabetical order.
.ifnot small
This command performs the same functions as _.CHAPTER except that an
appendix results.
This command acts as if the following command string were entered: 
.S.LM +5.LITERAL
.NO HEADER .PAGE SIZE .PAGE
.FIGURE 12 .CENTER  APPENDIX a
.BLANK 2 .CENTER; title
.BLANK 3 .TITLE title
.FILL .HEADER .SUBTITLE 
.END LITERAL
.S.LM -5
The letter following the word APPENDIX is incremented before it is printed.
Both _.STYLE CHAPTER and _.DISPLAY APPENDIX alter the look of the
appendix header.
.endif small