| 摘要 |
While viewing an electronically displayed document, a user creates a bookmark by selecting a desired part of a document to be marked. In response, a visual indicator is displayed and a bookmark object is created preferably separate from the document. The bookmark object comprises information linking the bookmark object to the desired part of the document as well as user-modifiable properties. If another part of the document is subsequently displayed, at least a portion of the visual indicator is still displayed. Later selection of the portion of the visual indicator causes the desired portion of the document to be re-displayed. Because the object is separate from the document, it may be viewed and sorted by its properties apart from its display with the document. A placemark is created whenever the display of a current document is discontinued. In response to a discontinuation signal, a placemark object comprising information linking the placemark object to a last-viewed part of the document is created. Subsequent selection of the document for re-display causes the last-viewed part of the document to be displayed.
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