In AutoCAD Civil 3D it can be very tedious to edit Label Styles one at a time. Depending on your CAD standards this may be necessary. However, it is likely that most if not all of your labels will have some things in common. For example you might use the same text style, height, or color for all of your labels. If that is the case you can set the common parameters for all of your Civil 3D Label Styles in one place.
For the complete tutorial, (and many others) follow this link...
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