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<a name="Page-breaking" class="anchor"></a>
<a name="Page-breaking-1" class="anchor"></a>
<h2 class="chapter">Page breaking</h2>
<a name="index-page-breaking" class="anchor"></a>
<a name="index-breaking-pages" class="anchor"></a>
<p>Ordinarily LaTeX automatically takes care of breaking output into
pages with its usual aplomb. But if you are writing commands, or
tweaking the final version of a document, then you may need to
understand how to influence its actions.
</p>
<p>LaTeX’s algorithm for splitting a document into pages is more complex
than just waiting until there is enough material to fill a page and
outputting the result. Instead, LaTeX typesets more material than
would fit on the page and then chooses a break that is optimal in some
way (it has the smallest badness). An example of the advantage of this
approach is that if the page has some vertical space that can be
stretched or shrunk, such as with rubber lengths between paragraphs,
then LaTeX can use that to avoid widow lines (where a new page starts
with the last line of a paragraph; LaTeX can squeeze the extra line
onto the first page) and orphans (where the first line of paragraph is
at the end of a page; LaTeX can stretch the material of the first
page so the extra line falls on the second page). Another example is
where LaTeX uses available vertical shrinkage to fit on a page not
just the header for a new section but also the first two lines of that
section.
</p>
<p>But LaTeX does not optimize over the entire document’s set of page
breaks. So it can happen that the first page break is great but the
second one is lousy; to break the current page LaTeX doesn’t look as
far ahead as the next page break. So occasionally you may want to
influence page breaks while preparing a final version of a document.
</p>
<p>See <a href="latex2e_5.html#Layout">Layout</a> for more material that is relevant to page breaking.
</p>
<hr>
<a name="g_t_005cclearpage-_0026-_005ccleardoublepage" class="anchor"></a>
<a name="g_t_005cclearpage-_0026-_005ccleardoublepage-1" class="anchor"></a>
<h3 class="section"><code>\clearpage</code> & <code>\cleardoublepage</code></h3>
<a name="index-_005cclearpage" class="anchor"></a>
<a name="index-flushing-floats-and-starting-a-page" class="anchor"></a>
<a name="index-starting-a-new-page-and-clearing-floats" class="anchor"></a>
<a name="index-_005ccleardoublepage" class="anchor"></a>
<a name="index-starting-on-a-right_002dhand-page" class="anchor"></a>
<p>Synopsis:
</p>
<div class="example">
<pre class="example">\clearpage
</pre></div>
<p>or
</p>
<div class="example">
<pre class="example">\cleardoublepage
</pre></div>
<p>End the current page and output all of the pending floating figures and
tables (see <a href="latex2e_5.html#Floats">Floats</a>). If there are too many floats to fit on the
page then LaTeX will put in extra pages containing only floats. In
two-sided printing, <code>\cleardoublepage</code> also makes the next page of
content a right-hand page, an odd-numbered page, if necessary inserting
a blank page. The <code>\clearpage</code> command is robust while
<code>\cleardoublepage</code> is fragile (see <a href="latex2e_12.html#g_t_005cprotect">\protect</a>).
</p>
<p>LaTeX’s page breaks are optimized so ordinarily you only use this
command in a document body to polish the final version, or inside
commands.
</p>
<p>The <code>\cleardoublepage</code> command will put in a blank page, but it
will have the running headers and footers. To get a really blank
page, use this command.
</p>
<div class="example">
<pre class="example">\let\origdoublepage\cleardoublepage
\newcommand{\clearemptydoublepage}{%
\clearpage
{\pagestyle{empty}\origdoublepage}%
}
</pre></div>
<p>If you want LaTeX’s standard <code>\chapter</code> command to do this then
add the line <code>\let\cleardoublepage\clearemptydoublepage</code>.
</p>
<p>The command <code>\newpage</code> (see <a href="#g_t_005cnewpage">\newpage</a>) also ends the current
page, but without clearing pending floats. And, if LaTeX is in
two-column mode then <code>\newpage</code> ends the current column while
<code>\clearpage</code> and <code>\cleardoublepage</code> end the current page.
</p>
<hr>
<a name="g_t_005cnewpage" class="anchor"></a>
<a name="g_t_005cnewpage-1" class="anchor"></a>
<h3 class="section"><code>\newpage</code></h3>
<a name="index-_005cnewpage" class="anchor"></a>
<a name="index-new-page_002c-starting" class="anchor"></a>
<a name="index-starting-a-new-page" class="anchor"></a>
<p>Synopsis:
</p>
<div class="example">
<pre class="example">\newpage
</pre></div>
<p>End the current page. This command is robust (see <a href="latex2e_12.html#g_t_005cprotect">\protect</a>).
</p>
<p>LaTeX’s page breaks are optimized so ordinarily you only use this
command in a document body to polish the final version, or inside
commands.
</p>
<p>While the commands <code>\clearpage</code> and <code>\cleardoublepage</code> also
end the current page, in addition they clear pending floats
(see <a href="#g_t_005cclearpage-_0026-_005ccleardoublepage">\clearpage & \cleardoublepage</a>). And, if LaTeX is in
two-column mode then <code>\clearpage</code> and <code>\cleardoublepage</code> end
the current page, possibly leaving an empty column, while
<code>\newpage</code> only ends the current column.
</p>
<p>In contrast with <code>\pagebreak</code> (see <a href="#g_t_005cpagebreak-_0026-_005cnopagebreak">\pagebreak & \nopagebreak</a>),
the <code>\newpage</code> command will cause the new page to start right where
requested. This
</p>
<div class="example">
<pre class="example">Four score and seven years ago our fathers brought forth on this
continent,
\newpage
\noindent a new nation, conceived in Liberty, and dedicated to the
proposition that all men are created equal.
</pre></div>
<p>makes a new page start after ‘<samp>continent,</samp>’ and the cut-off line is
not right justified. In addition, <code>\newpage</code> does not vertically
stretch out the page, as <code>\pagebreak</code> does.
</p>
<hr>
<a name="g_t_005cenlargethispage" class="anchor"></a>
<a name="g_t_005cenlargethispage-1" class="anchor"></a>
<h3 class="section"><code>\enlargethispage</code></h3>
<a name="index-_005cenlargethispage" class="anchor"></a>
<a name="index-enlarge-current-page" class="anchor"></a>
<p>Synopsis, one of:
</p>
<div class="example">
<pre class="example">\enlargethispage{size}
\enlargethispage*{size}
</pre></div>
<p>Enlarge the <code>\textheight</code> for the current page. The required
argument <var>size</var> must be a rigid length (see <a href="latex2e_14.html#Lengths">Lengths</a>). It may be
positive or negative. This command is fragile (see <a href="latex2e_12.html#g_t_005cprotect">\protect</a>).
</p>
<p>A common strategy is to wait until you have the final text of a
document, and then pass through it tweaking line and page breaks. This
command allows you some page size leeway.
</p>
<p>This will allow one extra line on the current page.
</p>
<div class="example">
<pre class="example">\enlargethispage{\baselineskip}
</pre></div>
<p>The starred form <code>\enlargesthispage*</code> tries to squeeze the material
together on the page as much as possible, for the common use case of
getting one more line on the page. This is often used together with an
explicit <code>\pagebreak</code>.
</p>
<hr>
<a name="g_t_005cpagebreak-_0026-_005cnopagebreak" class="anchor"></a>
<a name="g_t_005cpagebreak-_0026-_005cnopagebreak-1" class="anchor"></a>
<h3 class="section"><code>\pagebreak</code> & <code>\nopagebreak</code></h3>
<a name="index-_005cpagebreak" class="anchor"></a>
<a name="index-_005cnopagebreak" class="anchor"></a>
<a name="index-page-break_002c-forcing" class="anchor"></a>
<a name="index-page-break_002c-preventing" class="anchor"></a>
<p>Synopses:
</p>
<div class="example">
<pre class="example">\pagebreak
\pagebreak[<var>zero-to-four</var>]
</pre></div>
<p>or
</p>
<div class="example">
<pre class="example">\nopagebreak
\nopagebreak[<var>zero-to-four</var>]
</pre></div>
<p>Encourage or discourage a page break. The optional <var>zero-to-four</var>
is an integer that allows you to soften the request. The default is 4,
so that without the optional argument these commands entirely force or
prevent the break. But for instance <code>\nopagebreak[1]</code> suggests to
LaTeX that another spot might be preferable. The higher the number,
the more insistent the request. Both commands are fragile
(see <a href="latex2e_12.html#g_t_005cprotect">\protect</a>).
</p>
<p>LaTeX’s page endings are optimized so ordinarily you only use this
command in a document body to polish the final version, or inside
commands.
</p>
<p>If you use these inside a paragraph, they apply to the point following
the line in which they appear. So this
</p>
<div class="example">
<pre class="example">Four score and seven years ago our fathers brought forth on this
continent,
\pagebreak
a new nation, conceived in Liberty, and dedicated to the proposition
that all men are created equal.
</pre></div>
<p>does not give a page break at ‘<samp>continent,</samp>’ but instead at
‘<samp>nation,</samp>’ since that is where LaTeX breaks that line. In
addition, with <code>\pagebreak</code> the vertical space on the page is
stretched out where possible so that it extends to the normal bottom
margin. This can look strange, and if <code>\flushbottom</code> is in effect
this can cause you to get ‘<samp>Underfull \vbox (badness 10000) has
occurred while \output is active</samp>’. See <a href="#g_t_005cnewpage">\newpage</a> for a command that
does not have these effects.
</p>
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