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163 lines
7.4 KiB
163 lines
7.4 KiB
% ======================================================================
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% common-headfootheight.tex
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% Copyright (c) Markus Kohm, 2013-2019
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%
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% This file is part of the LaTeX2e KOMA-Script bundle.
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%
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% This work may be distributed and/or modified under the conditions of
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% the LaTeX Project Public License, version 1.3c of the license.
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% The latest version of this license is in
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% http://www.latex-project.org/lppl.txt
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% and version 1.3c or later is part of all distributions of LaTeX
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% version 2005/12/01 or later and of this work.
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% This work has the LPPL maintenance status "author-maintained".
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% The Current Maintainer and author of this work is Markus Kohm.
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% This work consists of all files listed in manifest.txt.
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% ----------------------------------------------------------------------
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% common-headfootheight.tex
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% Copyright (c) Markus Kohm, 2013-2019
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%
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% Dieses Werk darf nach den Bedingungen der LaTeX Project Public Lizenz,
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% Version 1.3c, verteilt und/oder veraendert werden.
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% Die neuste Version dieser Lizenz ist
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% http://www.latex-project.org/lppl.txt
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% und Version 1.3c ist Teil aller Verteilungen von LaTeX
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% Version 2005/12/01 oder spaeter und dieses Werks.
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%
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% Dieses Werk hat den LPPL-Verwaltungs-Status "author-maintained"
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% (allein durch den Autor verwaltet).
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%
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% Der Aktuelle Verwalter und Autor dieses Werkes ist Markus Kohm.
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% Dieses Werk besteht aus den in manifest.txt aufgefuehrten Dateien.
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% ======================================================================
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%
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% Text that is common for several chapters of the KOMA-Script guide
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% Maintained by Markus Kohm
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%
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% ----------------------------------------------------------------------
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%
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% Absaetze, die mehreren Kapitels in der KOMA-Script-Anleitung gemeinsam sind
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% Verwaltet von Markus Kohm
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%
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% ============================================================================
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\KOMAProvidesFile{common-headfootheight.tex}
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[$Date: 2019-11-13 12:33:18 +0100 (Wed, 13 Nov 2019) $
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KOMA-Script guide (common paragraph: Head and Foot Height)]
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\translator{Markus Kohm\and Jana Schubert\and Jens H\"uhne\and Karl Hagen}
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% Date of the translated German file: 2019-11-13
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\section{Header and Footer Height}
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\seclabel{height}
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\BeginIndexGroup
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\BeginIndex{}{header>height}%
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\BeginIndex{}{footer>height}%
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\IfThisCommonLabelBase{scrlayer-scrpage}{%
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\begin{Explain}%
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The \LaTeX{} standard classes do not use the footer much, and if they do
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use it, they put the contents into a \Macro{mbox} which results in the
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footer being a single text line. This is probably the reason that \LaTeX{}
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itself does not have a well-defined footer height. Although the distance
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between the last baseline of the text area and the baseline of the footer
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is defined with \Length{footskip}\IndexLength[indexmain]{footskip}, if the
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footer consists of more than one text line, there is no definite statement
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whether this length should be the distance to the first or the last
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baseline of the footer.
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Although the page header of the standard classes will also be put into a
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horizontal box, and therefore is also a single text line, \LaTeX{} in fact
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provides a length to set the height of the header. The reason for this may
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be that this height is needed to determine the start of the text area.
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\end{Explain}%
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}{%
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The header and footer of a page are central elements not just of a page
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style. They can also serve to restrict layers using the appropriate options
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(see \autoref{tab:scrlayer.layerkeys},
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\autopageref{tab:scrlayer.layerkeys}). Therefore the heights of these
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elements must be defined.%
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}
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\IfThisCommonFirstRun{}{%
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The information in \autoref{sec:\ThisCommonFirstLabelBase.height} applies
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equally to this chapter. So if you have already read and understood
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\autoref{sec:\ThisCommonFirstLabelBase.height}, you can skip ahead to
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\autoref{sec:\ThisCommonLabelBase.height.next},
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\autopageref{sec:\ThisCommonLabelBase.height.next}.%
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}
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\begin{Declaration}
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\Length{footheight}
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\Length{headheight}
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\IfThisCommonLabelBase{scrlayer-scrpage}{%
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\OptionVName{autoenlargeheadfoot}{simple switch}%
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}{}%
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\end{Declaration}
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The \Package{scrlayer} package introduces a new length, \Length{footheight},
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analogous to \Length{headheight}%
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\IfThisCommonLabelBase{scrlayer-scrpage}{}{of the \LaTeX{} kernel}.
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Additionally,
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\Package{scrlayer\IfThisCommonLabelBase{scrlayer-scrpage}{-scrpage}{}}
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interprets \Length{footskip} to be the distance from the last baseline of the
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text area to the first normal baseline of the footer. The
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\hyperref[cha:typearea]{\Package{typearea}}\IndexPackage{typearea}%
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\important{\hyperref[cha:typearea]{\Package{typearea}}} package interprets
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\Length{footheight} in the same way, so \Package{typearea}'s options for the
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footer height can also be used to set the values for the \Package{scrlayer}
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package. See the \DescRef{typearea.option.footheight} and
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\DescRef{typearea.option.footlines} options in
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\autoref{sec:typearea.typearea}, \DescPageRef{typearea.option.footheight})
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and option \DescRef{typearea.option.footinclude} on
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\DescPageRef{typearea.option.footinclude} of the same section.
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If you do not use the \hyperref[cha:typearea]{\Package{typearea}}%
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\important{\hyperref[cha:typearea]{\Package{typearea}}} package, you should
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adjust the header and footer heights using appropriate values for the lengths
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where necessary. For the header, at least, the \Package{geometry} package, for
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example, provides similar settings.
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\IfThisCommonLabelBase{scrlayer-scrpage}{\par%
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If you choose a header or footer height that is too small for the actual
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content, \Package{scrlayer-scrpage} tries by default to adjust the lengths
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appropriately. At the same time, it will issue a warning containing
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suggestions for suitable settings. These automatic changes take effect
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immediately after the need for them has been detected and are not
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automatically reversed, for example, when the content of the header or
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footer becomes smaller afterwards.
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However,\ChangedAt{v3.25}{\Package{scrlayer-scrpage}}, this behaviour can be
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changed by using the \Option{autoenlargeheadfoot} option. This option
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recognizes the values for simple switches in \autoref{tab:truefalseswitch},
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\autopageref{tab:truefalseswitch}. The option is activated by default. If it
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is deactivated, the header and footer are no longer enlarged
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automatically. Only a warning with hints for suitable settings is issued.%
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}{%
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\IfThisCommonLabelBase{scrlayer}{\par%
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If you choose a header or footer height that is too small for the actual
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content, \Package{scrlayer} usually accepts this without issuing an error
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message or a warning. The header then expands according to its height,
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usually upwards, with the footer moved down accordingly. Information about
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this change is not obtained automatically. However, packages like
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\hyperref[cha:scrlayer-scrpage]{\Package{scrlayer-scrpage}}%
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\important{\hyperref[cha:scrlayer-scrpage]{\Package{scrlayer-scrpage}}}%
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\IndexPackage{scrlayer-scrpage} that build upon \Package{scrlayer} may
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contain their own tests which can lead to their own actions (see
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\DescRef{scrlayer-scrpage.length.headheight} and
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\DescRef{scrlayer-scrpage.length.footheight} on
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\DescPageRef{scrlayer-scrpage.length.headheight}).%
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}{}%
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}%
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\EndIndexGroup
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%
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\EndIndexGroup
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%%% Local Variables:
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%%% mode: latex
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%%% mode: flyspell
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%%% coding: us-ascii
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%%% ispell-local-dictionary: "en_GB"
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%%% TeX-master: "../guide.tex"
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%%% TeX-PDF-mode: t
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%%% End:
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