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Dimension Text Display Options.
| Constant | Value | Description | 
|---|---|---|
| esriDimensionTDValueOnly | 0 | Only display the value of the dimension length. | 
| esriDimensionTDPrefixSuffix | 1 | Display the value of the dimension length with a prefix and suffix. | 
| esriDimensionTDExpression | 2 | Display a text string derived from a custom expression. | 
| esriDimensionTDNone | 3 | Do not display any text. |