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Landmarks<br />

Two Landmark tools have been <strong>in</strong>corporated <strong>in</strong>to the CASCADE <strong>in</strong>terface. They allow the user to know th<strong>in</strong>gs<br />

about the overall document <strong>in</strong>clud<strong>in</strong>g portions not visible <strong>in</strong> the display w<strong>in</strong>dow allow<strong>in</strong>g the user to form<br />

<strong>in</strong>ferences and take actions based on this <strong>in</strong><strong>format</strong>ion. The two Landmark tools are Mural and Tilebars. Tilebars<br />

is based on the work of Hearst et al. [Hearst 1995].<br />

Mural<br />

Figure 3 shows a CASCADE display <strong>in</strong> which the document which is be<strong>in</strong>g viewed conta<strong>in</strong>s a large number of<br />

hypertext l<strong>in</strong>ks.

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