【求助】关于尺寸修改

jeason

请教一下:
doc中讲述修改尺寸时.尺寸的前后会有▲出现(以方便添加前后缀).可我怎么看不见
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1.  Click?the Select icon  , if needed.
2.   Click the dimension to be modified.
The dimension is highlighted and two red triangles appear
both left and right of the dimension value.
3.   Click the left red triangle, for example.
  The Insert Text Before dialog box appears:
(来自:E:\Dassault Systemes\B10doc\English\online\catfr_C2\draugCATIAfrs.htm)
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请问你们会有这种想象吗?还是要什么特殊的操作呀.

ππ神醫

jeason