<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>Settings</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>Catalogs</guilabel>, <guilabel>Guides</guilabel>, 
<guilabel>Solar System</guilabel>, <guilabel>Colors</guilabel>, and 
<guilabel>Advanced</guilabel>.  Below the tabs, you can choose between 
Equatorial and Horizontal coordinate systems.  Note that changes you make 
in this window are reflected immediately in the map, but that the changes 
are not committed until you press the <guibutton>Ok</guibutton> button.
</para><para>
In the <guilabel>Catalogs</guilabel> tab, you determine which object catalogs 
are displayed in the map.  The SAO star catalog also allows you to set the 
<quote>faint limit</quote> for stars, and the magnitude (brightness) limit for displaying
the names and/or magnitudes of stars.  Below the stars section, there is a box
containing a list of checkboxes for the available deep-sky object catalogs. 
You can add your own custom object catalogs by pressing the <guibutton>Add 
Custom Catalog</guibutton> button, which will open a <guilabel>File 
Dialog</guilabel>, so that you can point it to your catalog data file.  For 
detailed instructions on preparing a catalog data file, see the 
<filename>README.customize</filename> file that ships with &kstars;.
</para><para>
In the <guilabel>Solar System</guilabel> tab, you can specify whether the Sun, 
Moon and Planets are displayed, whether these objects are drawn as circles 
or images, and whether name labels should be attached to the Planets.  
</para><para>
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).  You can also 
choose whether you would like to see Latin constellation names, <acronym>IAU</acronym>-standard 
three-letter abbreviations, or names using your local language.
</para><para>
The <guilabel>Colors</guilabel> tab allows you to set the color scheme, and to 
define custom color schemes.  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, simply highlight it in the list, and press the
<guibutton>Remove Color Scheme</guibutton> button.
</para>
</chapter>