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Annotation of 43BSDReno/share/doc/usd/25.trofftut/tt03, revision 1.1

1.1     ! root        1: .\"    @(#)tt03        6.1 (Berkeley) 5/23/86
        !             2: .\"
        !             3: .NH
        !             4: Fonts and Special Characters
        !             5: .PP
        !             6: .UL troff
        !             7: and the typesetter allow four different fonts at any one time.
        !             8: Normally three fonts (Times roman, italic and bold) and one collection of special characters
        !             9: are permanently
        !            10: mounted.
        !            11: .P1 2
        !            12: .ft R
        !            13: abcdefghijklmnopqrstuvwxyz 0123456789
        !            14: ABCDEFGHIJKLMNOPQRSTUVWXYZ
        !            15: .ft I
        !            16: abcdefghijklmnopqrstuvwxyz 0123456789
        !            17: ABCDEFGHIJKLMNOPQRSTUVWXYZ
        !            18: .ft B
        !            19: abcdefghijklmnopqrstuvwxyz 0123456789
        !            20: ABCDEFGHIJKLMNOPQRSTUVWXYZ
        !            21: .ft R
        !            22: .P2
        !            23: The
        !            24: greek, mathematical symbols and miscellany
        !            25: of the special font are
        !            26: listed in Appendix A.
        !            27: .PP
        !            28: .UL troff
        !            29: prints in roman unless told otherwise.
        !            30: To switch into bold, use
        !            31: the
        !            32: .BD .ft
        !            33: command
        !            34: .P1
        !            35: ^ft B
        !            36: .P2
        !            37: and for italics,
        !            38: .P1
        !            39: ^ft I
        !            40: .P2
        !            41: To return to roman, use
        !            42: .BD .ft\ R ;
        !            43: to return to the previous font,
        !            44: whatever it was,
        !            45: use either
        !            46: .BD .ft\ P
        !            47: or just
        !            48: .BD .ft  .
        !            49: The `underline' command
        !            50: .P1
        !            51: ^ul
        !            52: .P2
        !            53: causes the next input line to print in italics.
        !            54: .BD .ul
        !            55: can be followed by a count to
        !            56: indicate that more than one line is to be italicized.
        !            57: .PP
        !            58: Fonts can also be changed within a line or word
        !            59: with the in-line command
        !            60: .BD \ef :
        !            61: .P1
        !            62: \fBbold\fIface\fR text
        !            63: .P2
        !            64: is produced by
        !            65: .P1
        !            66: \efBbold\efIface\efR text
        !            67: .P2
        !            68: If you want to do this so the previous font, whatever it was,
        !            69: is left undisturbed, insert extra
        !            70: .BD \efP
        !            71: commands, like this:
        !            72: .P1
        !            73: \efBbold\efP\efIface\efP\efR text\efP
        !            74: .P2
        !            75: Because only the immediately previous font is remembered,
        !            76: you have to restore the previous font after each change
        !            77: or you can lose it.
        !            78: The same is true of 
        !            79: .BD .ps
        !            80: and
        !            81: .BD .vs
        !            82: when used without an argument.
        !            83: .PP
        !            84: There are other fonts available besides the standard set,
        !            85: although you can still use only four at any given time.
        !            86: The command
        !            87: .BD .fp
        !            88: tells
        !            89: .UL troff
        !            90: what fonts are physically mounted on the typesetter:
        !            91: .P1
        !            92: ^fp 3 H
        !            93: .P2
        !            94: says that the Helvetica font is mounted on position 3.
        !            95: (The complete list of font sizes and styles depends on
        !            96: your typesetter or laser printer.)
        !            97: Appropriate
        !            98: .BD .fp
        !            99: commands should appear at the beginning of your document
        !           100: if you do not use the standard fonts.
        !           101: .PP
        !           102: It is possible to make a document relatively independent
        !           103: of the actual fonts used to print it
        !           104: by using font numbers instead of names;
        !           105: for example,
        !           106: .BD \ef3
        !           107: and
        !           108: .BD .ft\ 3
        !           109: mean `whatever font is mounted at position 3',
        !           110: and thus work for any setting.
        !           111: Normal settings are roman font on 1, italic on 2,
        !           112: bold on 3,
        !           113: and special on 4.
        !           114: .PP
        !           115: There is also a way to get `synthetic' bold fonts
        !           116: by overstriking letters with a slight offset.
        !           117: Look at the
        !           118: .BD .bd
        !           119: command in [1].
        !           120: .WS
        !           121: .PP
        !           122: Special characters have four-character names beginning with
        !           123: .BD \e( ,
        !           124: and they may be inserted anywhere.
        !           125: For example,
        !           126: .P1
        !           127: \(14 + \(12 = \(34
        !           128: .P2
        !           129: is produced by
        !           130: .P1
        !           131: \e(14 + \e(12 = \e(34
        !           132: .P2
        !           133: In particular,
        !           134: greek letters are all of the form
        !           135: .BD  \e(*\- ,
        !           136: where
        !           137: .BD \-
        !           138: is an upper or lower case roman letter
        !           139: reminiscent of the greek.
        !           140: Thus
        !           141: to get
        !           142: .P1
        !           143: \(*S(\(*a\(mu\(*b) \(-> \(if
        !           144: .P2
        !           145: in bare
        !           146: .UL troff
        !           147: we have to type
        !           148: .P1
        !           149: \e(*S(\e(*a\e(mu\e(*b) \e(\(mi> \e(if
        !           150: .P2
        !           151: That line is unscrambled as follows:
        !           152: .P1
        !           153: .ta 1i 2i 3i
        !           154: \e(*S  \(*S
        !           155: (      (
        !           156: \e(*a  \(*a
        !           157: \e(mu  \(mu
        !           158: \e(*b  \(*b
        !           159: )      )
        !           160: \e(\(mi>       \(->
        !           161: \e(if  \(if
        !           162: .P2
        !           163: A complete list of these special names occurs in Appendix A.
        !           164: .PP
        !           165: In
        !           166: .UL eqn 
        !           167: [2]
        !           168: the same effect can be achieved with the input
        !           169: .P1
        !           170: SIGMA ( alpha times beta ) \-> inf
        !           171: .P2
        !           172: which is less concise, but clearer to the uninitiated.
        !           173: .PP
        !           174: Notice that
        !           175: each
        !           176: four-character name is a single character
        !           177: as far as
        !           178: .UL troff
        !           179: is concerned _
        !           180: the
        !           181: `translate' command
        !           182: .P1
        !           183: ^tr \e(mi\e(em
        !           184: .P2
        !           185: is perfectly clear, meaning
        !           186: .P1
        !           187: ^tr \(mi\(em
        !           188: .P2
        !           189: that is, to translate \(mi into \(em.
        !           190: .PP
        !           191: Some characters are automatically translated into others:
        !           192: grave  \(ga  and acute  \(aa  accents (apostrophes) become open and close single quotes
        !           193: `\|'\|;
        !           194: the combination of ``...'' is generally preferable to the double quotes "...".
        !           195: Similarly a typed minus sign becomes a hyphen -.
        !           196: To print an explicit \- sign, use
        !           197: .BD \e\|- .
        !           198: To get a backslash printed, use
        !           199: .BD \ee .

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