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The memoir class - The UK TeX Archive

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2.4. <strong>The</strong> typeblockTable 2.4: Arguments and results for \setlrmargins〈spine〉 〈edge〉 〈ratio〉 ResultS E r ambiguousS E * ambiguousS * r ambiguousS * * E = K w − S* E r ambiguous* E * S = K w − E* * r E + S = K w , E = rS* * * E + S = K w , E = STwo methods are provided for setting the horizontal dimensions on a page. One iswhere the width of the typeblock is fixed and the margins are adjustable. <strong>The</strong> other methodis where the size of the margins determines the width of the typeblock.\setlrmargins{〈spine〉}{〈edge〉}{〈ratio〉}<strong>The</strong> command \setlrmargins can be used to specify the side margins 2 with the width ofthe page and the typeblock being fixed.Not more than one one argument value is required, with any unvalued argumentsbeing denoted by an asterisk. <strong>The</strong>re are several cases to consider and these are tabulatedin Table 2.4.In the Table, S is the calculated spine margin, E is the calculated fore-edge margin,and P w and B w are respectively the page and typeblock widths. <strong>The</strong> \setlrmarginscommand maintains the relationshipS + E = K w = constant (= P w − B w ).<strong>The</strong> cases marked ambiguous in the Table are where the particular combination of argumentvalues may make it impossible to guarantee the relationship.Assuming that we have a 3in wide typeblock on a 5in wide page and we want thespine margin to be 0.8in and the fore-edge margin to be 1.2in (i.e., the fore-edge marginis half as big again as the spine margin) this can be accomplished in three ways (with the\paperwidth and \textwidth being previously specified and fixed):% specify spine margin\setlrmargins{0.8in}{*}{*}% specify fore-edge margin\setlrmargins{*}{1.2in}{*}% specify fore-edge/spine ratio\setlrmargins{*}{*}{1.5}\setlrmarginsandblock{〈spine〉}{〈edge〉}{〈ratio〉}2 Only the spine margin is noted in Figure 2.3 and 2.2; the fore-edge margin is at the opposite side of thetypeblock.17

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