<chapter id="config">
<title>Configuring &kstars;</title>
<para>
&kstars; has many configuration options, which you can access by opening
the <guilabel>Display Options</guilabel> window, either with the
<guiicon>wrench</guiicon> toolbar icon, or selecting <guimenuitem>Configure
&kstars;...</guimenuitem> from the <guimenu>View</guimenu> menu.  The
window is depicted below:

<screenshot>
<screeninfo>Display Options Window</screeninfo>
<mediaobject>
  <imageobject>
    <imagedata fileref="screen3.png" format="PNG"/>
  </imageobject>
  <textobject>
    <phrase>Display Options Window</phrase>
  </textobject>
</mediaobject>
</screenshot>
</para>

<para>
The <guilabel>Display Options</guilabel> window is divided into five tabs:
<guilabel>Stars</guilabel>, <guilabel>Catalogs</guilabel>,
<guilabel>Guides</guilabel>, <guilabel>Solar System</guilabel>, and
<guilabel>Colors</guilabel>.  Below the tabs, you can choose between Equatorial
and Horizontal coordinate systems (note that the opaque ground can only be
displayed when using Horizontal coordinates).
</para><para>
In the <guilabel>Stars</guilabel> tab, you can toggle whether any stars are
displayed (SAO Star Catalog), set the faint limit for named stars and for all
stars, and toggle whether the names and/or magnitudes (aka brightness) of the
brighter stars are displayed.  In the <guilabel>Catalogs</guilabel> tab, you can
toggle whether the deep sky catalogs are displayed.  The
<guilabel>Guides</guilabel> tab lets you toggle whether non-objects are
displayed (&ie;, constellation lines, constellation names, Milky Way contour,
celestial equator, ecliptic, horizon line, and opaque ground).  In the
<guilabel>Solar System</guilabel> tab, you can specify whether the Sun, Moon and
Planets are displayed.
</para><para>
Finally, you can set the color scheme in the <guilabel>Colors</guilabel> tab.
The tab is split into two panels:
</para><para>
The left panel shows a list of all display items with adjustable
colors.  Click on any item to bring up a color selection window to adjust the
color.  Below the list is the <guilabel>Star Color Mode</guilabel> selection
box.  By default, &kstars; draws stars with a realistic color tint according to
the spectral type of the star.  However, you may also choose to draw the stars
as solid white, black or red circles.  If you are using the realistic star
colors, you can choose the saturation level of the star colors with the
<guilabel>Star Color Intensity</guilabel> spinbox.
</para><para>
The right panel lists the defined color schemes.  There are three predefined
schemes: the Default scheme, a Star Chart scheme with black stars on a white
background, and Night Vision, which uses only shades of red in order to
protect your dark-adapted vision.  Additionally, you can save the current color
settings as a custom scheme by clicking the <guibutton>Save Current
Colors</guibutton> button.  It will prompt you for a name for the new scheme,
and then your scheme will appear in the list in all future &kstars; sessions.
To remove a custom scheme, you have to remove the appropriate line from the
<filename>~/.kde/share/apps/kstars/colors.dat</filename> file. You may want to
also delete the corresponding <literal role="extension">*.colors</literal> file
in the same directory, but as long as you remove the reference to it in
<filename>colors.dat</filename>, it won't appear in &kstars;.
</para>
</chapter>
