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<html>
<!-- #BeginTemplate "pdn_help.dwt" -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<!-- #BeginEditable "title" -->
<title>Paint.NET Help - Line / Curve Tool</title>
<!-- #EndEditable -->
<link rel="stylesheet" type="text/css" href="../stylesheet.css">
</head>
<body>
<div id="banner">
<img border="0" src="../images/logo.png" width="229" height="73" align="left"><p><b><br>
</b></p>
</div>
<div id="leftnav">
<ul class="toc" style="margin-left: 0; padding-left: 0;">
<li><a href="index.html">Overview</a><br>
</li>
<li><a href="Features.html">Features</a><br>
<a href="Tutorials.html">Tutorials</a><br>
</li>
</ul>
<h3>User Interface</h3>
<ul class="toc" style="margin-left: 0; padding-left: 0;">
<li><a href="KeyboardMouseCommands.html">Keyboard & Mouse Commands</a></li>
<li><a href="MainWindow.html">Main Window</a></li>
<li><a href="MenuBar.html">Menu Bar</a>
<ul class="toc">
<li><a href="File.html">File</a></li>
<li><a href="Edit.html">Edit</a></li>
<li><a href="View.html">View</a></li>
<li><a href="Image.html">Image</a></li>
<li><a href="Layers.html">Layers</a>
<ul class="toc">
<li class="comment"><a href="RotateZoom.html">Rotate / Zoom</a></li>
<li><a href="Adjustments.html">Adjustments</a>
<ul class="toc">
<li><a href="Curves.html">Curves</a></li>
<li><a href="Levels.html">Levels</a></li>
</ul></li>
</ul></li>
<li><a href="Effects.html">Effects</a></li>
<li><a href="Tools.html">Tools</a></li>
<li><a href="Window.html">Window</a></li>
<li><a href="Help.html">Help</a></li>
<li><a href="Toolbar.html">Toolbar</a></li>
</ul>
</li>
<li><a href="ToolsWindow.html">Tools Window</a><ul class="toc">
<li><a href="SelectionTools.html">Selection Tools</a></li>
<li><a href="MoveTools.html">Move Tools</a><br>
<a href="MagicWand.html">Magic Wand</a><br>
<a href="Paintbrush.html">Paintbrush</a></li>
<li><a href="EraserTool.html">Eraser Tool</a></li>
<li><a href="PixelTools.html">Pixel Tools</a></li>
<li><a href="ShapeTools.html">Shape Tools</a></li>
<li><a href="LineCurve.html">Line / Curve Tool</a></li>
<li><a href="TextTool.html">Text Tool</a></li>
<li><a href="PaintBucket.html">Paint Bucket</a></li>
<li><a href="CloneStamp.html">Clone Stamp</a></li>
<li><a href="RecolorTool.html">Recolor Tool</a></li>
</ul>
</li>
<li><a href="HistoryWindow.html">History Window</a></li>
<li><a href="LayersWindow.html">Layers Window</a></li>
<li><a href="ColorsWindow.html">Colors Window</a></li>
<li><a href="StatusBar.html">Status Bar</a></li>
</ul>
</li>
<h3>Other</h3>
<ul class="toc" style="margin-left: 0; padding-left: 0;">
<li><a href="FAQ.html">FAQ (Frequently Asked Questions)</a></li>
<li><a href="UnattendedInstallation.html">Unattended Installation</a></li>
<li><a href="SystemRequirements.html">System Requirements</a></li>
<li><a href="WebLinks.html">Web Links</a></li>
<li><a href="License.html">License</a></li>
</ul>
</div>
<div id="content">
<!-- #BeginEditable "content" -->
<h2>Line / Curve Tool</h2>
<p>This tool may be used to draw lines and curves. These two abilities are
grouped in to one tool because it is possible to stipulate that a line is
simply a perfectly straight curve; therefore, this tool always draws curves,
but "lines" simply no curve applied to them.</p>
<p>Drawing a line is simple: simply click where you want the line to start,
and then drag over to the ending point and release the mouse button. By
holding down the shift key before you release the mouse button, you may
constrain the line to a multiple-of-15 degrees angle. At this point, you
will see four handles, or <i>nubs</i>, appear on the line. </p>
<p>If you only want
to draw a line, you may press the Enter key at this point to finish the
line. You may also simply draw elsewhere to begin a new line.</p>
<p>The handles pulsate so that they are easier to distinguish from the rest
of the image:</p>
<ul>
<li class="nobullet">
<img border="0" src="../images/Line_Step1.png" width="152" height="148"></li>
</ul>
<p>At this point, you may <i>curve the line </i>by dragging the nubs. If you
use the left mouse button for dragging, then the line will be curved using
<a href="http://en.wikipedia.org/wiki/Cubic_spline">cubic
spline interpolation</a>. Essentially, the curve will be drawn such that it
always goes through each point. However, if you use the right mouse button
then you will draw what is known as a
<a href="http://en.wikipedia.org/wiki/BΘzier_curve">BΘzier curve</a>. With
this method, the curve will not necessarily go through each point, but you
will be able to draw curves that are not possible with the cubic spline
method.</p>
<p>A sample cubic spline curve:</p>
<ul>
<li class="nobullet">
<img border="0" src="../images/Line_Spline.png" width="153" height="151"></li>
</ul>
<p>A sample BΘzier curve. Note that the curve does not go through the two
middle nubs:</p>
<ul>
<li class="nobullet">
<img border="0" src="../images/Line_Bezier.png" width="156" height="156"></li>
</ul>
<p>When you are finished curving the line, you may press Enter to finish it.
Or, you may start drawing elsewhere to start another line.</p>
<!-- #EndEditable -->
<h4><br>
<br>
</h4>
<p align="center">
<font color="#808080" size="1">Copyright <font face="Times New Roman">⌐ 2006 </font>Rick Brewster,
Chris Crosetto, Dennis Dietrich, Tom
Jackson, Michael Kelsey, Brandon Ortiz, Craig Taylor, Chris Trevino, and Luke Walker. Portions Copyright
<font face="Times New Roman">⌐ 2006 </font>Microsoft Corporation. All Rights Reserved.</font><font size="1"> <br>
</font>
</div>
</b>
</body>
<!-- #EndTemplate -->
</html>