查了一下帮助文档，我真的没话可说了：
Ubuntu8.04.3+OOo 2.4.1
代码： 全选
Legend
The legend displays the labels from the first row or column, or from the range that you have set in the Data Series dialog. If your chart does not contain labels, the legend displays text like "Row 1, Row 2, ...", or "Column A, Column B, ..." according to the row number or column letter of the chart data.
You cannot enter the text directly, it is automatically generated from the Name cell range.
Select one of the position options. When the chart is finished, you can specify other positions using the Format menu.