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<a name="sec-page-setup"></a>Page setup</h2></div></div></div>
<p>
The <code class="classname">PrintOperation</code> class has a method called
<code class="methodname">set_default_page_setup()</code> which selects the default
paper size, orientation and margins. To show a page setup dialog from your
application, use the <code class="methodname">Gtk::run_page_setup_dialog()</code> method,
which returns a <code class="classname">Gtk::PageSetup</code> object with the chosen
settings. Use this object to update a <code class="classname">PrintOperation</code>
and to access the selected <code class="classname">Gtk::PaperSize</code>,
<code class="literal">Gtk::PageOrientation</code> and printer-specific margins.
</p>
<p>You should save the chosen <code class="classname">Gtk::PageSetup</code>
so you can use it again if the page setup dialog is shown again.</p>
<p>For instance,</p>
<pre class="programlisting"><code class="code">// Within a class that inherits from Gtk::Window and keeps m_refPageSetup
// and m_refSettings as members...
auto new_page_setup = Gtk::run_page_setup_dialog(*this, m_refPageSetup, m_refSettings);
m_refPageSetup = new_page_setup;
</code></pre>
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<a class="ulink" href="https://gnome.pages.gitlab.gnome.org/gtkmm/classGtk_1_1PageSetup.html" target="_top">Reference</a>
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<p>
The Cairo coordinate system, in the <code class="literal">draw_page</code> handler,
is automatically rotated to the current page orientation. It is normally
within the printer margins, but you can change that via the
<code class="methodname">PrintOperation::set_use_full_page()</code>
method. The default measurement unit is device pixels. To select other units,
use the <code class="methodname">PrintOperation::set_unit()</code> method.
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