2、选择尺寸类型工具条，选择隐藏实际尺寸值选项。
3、选择“前缀”（Prefix），输入文本，OK。
1、Create your dimension. select it (goes pink)
2、Go to the select Tool – Dimension type (top tool bar) and select the grayed out x. This hides the actual dimension value.
3、Go to the select Tool – Prefix and type in the text you want, probably in the prefix box.