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<html>
<head>
<title>Treemap</title>
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<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
<link rel="stylesheet" type="text/css" href="format.css">
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<BODY>
<h2>Treemap</h2>
<p>The treemap shows the whole contents of the <a href="whatisatree.htm">directory tree</a>
straight away.
</p>
<p>It represents each file as a colored rectangle, the area of which is
proportional to the file's size.
</p>
The rectangles are arranged in such a way, that directories again make up
rectangles, which contain all their files and subdirectories. So their area is
proportional to the size of the subtrees. </p>
<p>The color of a rectangle indicates the type of the file, as shown in the
extension list.
</p>
<p>The cushion shading additionally brings out the directory structure.</p>
<h3>Operation</h3>
<p>You effortlessly see the big rectangles, that is the big files, even if they are
hidden deeply in subdirectories in the directory tree. Click on them: the
directory list opens the path to the file, and you can read its location and
attributes, and - if you like - apply a cleanup action on it, e.g. delete the
file.
</p>
<p>Navigate in the directory list: the respective selection is highlighted with a
colored frame. In this way gain an impression of the proportions: How big, for
example, is C:\windows compared with C:\program files?
</p>
<p>The context menu options "Select Parent" and "Re-select Child" are also useful
for the navigation.
</p>
<p>Zoom. The option "Zoom in" enlarges the treemap, so that a subtree is
displayed full size. As it were you make a step towards the selected item.
The directory list show the root of this subtree with a blue frame.
By "Zoom out" you step back, and the parent element is shown again.
</p>
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