To Erase a Witness Line
You can erase only one witness line of a dimension. If you try to erase the second one after erasing the first one, the system erases the second one and restores the first one. You cannot erase both.
1. Select the witness line of the dimension to erase.
2. Right-click, and select the Erase Witness Line option.
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 You cannot erase the witness lines of ordinate dimensions (including ISO-standard ordinate dimensions with a cross-line between the baseline and the dimension). |
You cannot blank the witness line of a clipped dimension (one that has been clipped as a result of view clipping), and you cannot use Show Model Annotations to restore a witness line that has been automatically erased (clipped due to view clipping).