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Annotation of 43BSDReno/share/doc/usd/25.trofftut/tt04, revision 1.1

1.1     ! root        1: .\"    @(#)tt04        6.1 (Berkeley) 5/23/86
        !             2: .\"
        !             3: .NH
        !             4: Indents and Line Lengths
        !             5: .PP
        !             6: .UL troff
        !             7: starts with a line length of 6.5 inches,
        !             8: which some people think is too wide for 8\(12\(mu11 paper.
        !             9: To reset the line length,
        !            10: use
        !            11: the
        !            12: .BD .ll
        !            13: command, as in
        !            14: .P1
        !            15: ^ll 6i
        !            16: .P2
        !            17: As with
        !            18: .BD .sp ,
        !            19: the actual length can be specified in several ways;
        !            20: inches are probably the most intuitive.
        !            21: .PP
        !            22: The maximum line length provided by the typesetter is 7.5 inches, by the way.
        !            23: To use the full width, you will have to reset the default physical left margin (``page offset''),
        !            24: which is normally slightly less than one inch from the left edge
        !            25: of the paper.
        !            26: This is done by the
        !            27: .BD .po
        !            28: command.
        !            29: .P1
        !            30: ^po 0
        !            31: .P2
        !            32: sets the offset as far to the left as it will go.
        !            33: .WS
        !            34: .PP
        !            35: The indent command
        !            36: .BD .in
        !            37: causes the left margin to be indented
        !            38: by some specified amount from the page offset.
        !            39: If we use
        !            40: .BD .in
        !            41: to move the left margin in,
        !            42: and
        !            43: .BD .ll
        !            44: to move the right margin to the left,
        !            45: we can
        !            46: make offset blocks of text:
        !            47: .P1
        !            48: ^in 0.3i
        !            49: ^ll \(mi0.3i
        !            50: text to be set into a block
        !            51: ^ll +0.3i
        !            52: ^in \(mi0.3i
        !            53: .P2
        !            54: will create a block that looks like this:
        !            55: .P1
        !            56: .fi
        !            57: .ll -0.3i
        !            58: Pater noster qui est in caelis sanctificetur nomen tuum;
        !            59: adveniat regnum tuum; fiat voluntas tua, sicut in caelo,
        !            60: et in terra. ...
        !            61: Amen.
        !            62: .ll +0.3i
        !            63: .P2
        !            64: Notice the use of `+' and `\(mi'
        !            65: to specify the amount of change.
        !            66: These change the previous setting by the specified amount,
        !            67: rather than just overriding it.
        !            68: The distinction is quite important:
        !            69: .BD .ll\ +1i
        !            70: makes lines one inch longer;
        !            71: .BD .ll\ 1i
        !            72: makes them one inch
        !            73: .ul
        !            74: long.
        !            75: .PP
        !            76: With 
        !            77: .BD .in ,
        !            78: .BD .ll
        !            79: and
        !            80: .BD .po ,
        !            81: the previous value is used if no argument is specified.
        !            82: .PP
        !            83: To indent a single line, use the `temporary indent'
        !            84: command
        !            85: .BD .ti .
        !            86: For example, all paragraphs in this memo
        !            87: effectively begin with the command
        !            88: .P1
        !            89: ^ti 3
        !            90: .P2
        !            91: Three of what?
        !            92: The default unit for
        !            93: .BD .ti ,
        !            94: as for most horizontally oriented commands
        !            95: .BD .ll , (
        !            96: .BD .in ,
        !            97: .BD .po ),
        !            98: is ems;
        !            99: an em is roughly the width of the letter `m'
        !           100: in the current point size.
        !           101: (Precisely, a em in size
        !           102: .ul
        !           103: p
        !           104: is
        !           105: .ul
        !           106: p
        !           107: points.)
        !           108: Although inches are usually clearer than ems to people who don't set type
        !           109: for a living,
        !           110: ems have a place:
        !           111: they are a measure of size that is proportional to the current point size.
        !           112: If you want to make text that keeps its proportions
        !           113: regardless of point size,
        !           114: you should use ems for all dimensions.
        !           115: Ems can be specified as scale factors directly,
        !           116: as in
        !           117: .BD .ti\ 2.5m .
        !           118: .PP
        !           119: Lines can also be indented negatively
        !           120: if the indent is already positive:
        !           121: .P1
        !           122: ^ti \(mi0.3i
        !           123: .P2
        !           124: causes the next line to be moved back three tenths of an inch.
        !           125: Thus to make a decorative initial capital,
        !           126: we indent the whole paragraph, then move the letter `P' back with
        !           127: a
        !           128: .BD .ti
        !           129: command:
        !           130: .P1
        !           131: .ll -0.3i
        !           132: .fi
        !           133: .in +.3i
        !           134: .ti -0.3i
        !           135: \s36\v'2'P\v'-2'\s0ater noster qui est in caelis sanctificetur
        !           136: nomen tuum;
        !           137: adveniat regnum tuum;
        !           138: 'in -.3i
        !           139: fiat voluntas tua,
        !           140: sicut in caelo, et in terra. ...
        !           141: Amen.
        !           142: .ll +0.3i
        !           143: .P2
        !           144: Of course, there is also some trickery to make the `P'
        !           145: bigger (just a `\es36P\es0'),
        !           146: and to move it
        !           147: down from its normal position
        !           148: (see the section on local motions).

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