1 .TH PROOF 1
2 .SH NAME
3 proof \- troff output interpreter
4 .SH SYNOPSIS
5 .B proof
6 [
7 .BI -m mag
8 ]
9 [
10 .BI -/ nview
11 ]
12 [
13 .B -F
14 .I dir
15 ]
16 [
17 .B -d
18 ]
19 [
20 .I file
21 ]
22 .SH DESCRIPTION
23 .I Proof
24 reads
25 .MR troff (1)
26 intermediate language from
27 .I file
28 or standard input
29 and simulates the resulting pages on the screen.
30 .PP
31 After a page of text is displayed,
32 .I proof
33 pauses for a command from the keyboard.
34 The typed commands are:
35 .TP \w'newline\ \ \ 'u
36 newline
37 Go on to next page of text.
38 .TP
39 .B -
40 Go back to the previous page.
41 .TP
42 .B q
43 Quit.
44 .TP
45 .BI p n
46 Print page
47 .IR n .
48 An out-of-bounds page number means the end nearer to that number;
49 a missing number means the current page;
50 a signed number means an offset to the current page.
51 .TP
52 .I n
53 Same as
54 .BI p n\f1.
55 .TP
56 .B c
57 Clear the screen, then wait for another command.
58 .TP
59 .BI m mag
60 Change the magnification at which the output is printed.
61 Normally it is printed with magnification .9;
62 .IR mag "=.5"
63 shrinks it to half size;
64 .IR mag "=2"
65 doubles the size.
66 .TP
67 .BI x val
68 Move everything
69 .I val
70 screen pixels to the right (left, if
71 .I val
72 is negative).
73 .TP
74 .BI y val
75 Move everything
76 .I val
77 screen pixels down (up, if
78 .I val
79 is negative).
80 .TP
81 .BI / nview
82 Split the window into
83 .I nview
84 pieces.  The current page goes into the rightmost, bottommost piece,
85 and previous pages are shown in the other pieces.
86 .TP
87 .BI "-F " dir
88 Use
89 .I dir
90 for fonts instead of
91 .BR /lib/font/bit .
92 .TP
93 .B d
94 Toggle the debug flag.
95 .PD
96 .PP
97 These commands are also available, under slightly different form,
98 from a menu on button 3.  The
99 .B pan
100 menu item allows arbitrary positioning of the page:
101 after selecting
102 .BR pan ,
103 press the mouse button again and hold it down while moving
104 the page to the desired location.  The page will be redisplayed
105 in its entirety when the button is released.
106 Mouse button 1 also pans, without the need for selecting from a menu.
107 .PP
108 The
109 .BR m ,
110 .BR x ,
111 .BR y ,
112 .BR F ,
113 .BR / ,
114 and
115 .B d
116 commands are also available as command line options.
117 .SH FILES
118 .TP
119 .B \*9/font/*
120 fonts
121 .TP
122 .B \*9/font/MAP
123 how to convert troff output fonts and character names
124 into screen fonts and character numbers
125 .SH SOURCE
126 .B \*9/src/cmd/proof
127 .SH SEE ALSO
128 .IR lp (1), 
129 .MR gs (1) ,
130 .MR page (1)
131 .br
132 J. F. Ossanna and B. W. Kernighan,
133 ``Troff User's Manual''