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. You simply need to understand the tree structure of the Settings Tab of the Civil 3D Toolspace and the hierarchy that it uses. The drawing name is the root of the tree that all the features (like Points, Surfaces, and Parcels) branch off from. Under each feature you will find a folder or collection of Label Styles. For some features you will find different categories or types of Label Styles under the Label Styles folder, while in other features the Label Styles folder contains the Label Styles themselves. For features like Parcels that do have categories or types shown the Label Styles are contained within these categories.
Once you understand how things are organized controlling large groups of Label Styles is much easier. Basically, the higher that you go, or the closer to the root (drawing name) that you get the more that you can control or edit all at the same time, with the drawing name level controlling all of the Label Styles in the entire drawing. For example you can right-click on the drawing name and select Edit Label Style Defaults.
Then change the Component Color to Cyan. This would make all of the Labels in the drawing Cyan.
If you want the Labels for certain features to have unique properties then you move down the tree to that feature. For example you can right-click on the Parcel feature on the Settings Tab of the Civil 3D Toolspace and select Edit Label Style Defaults. Then change the Component Color to Yellow. This would make all of the Parcel Labels in the drawing Yellow.
You can even continue down the tree and edit a label category like making the Parcel Area Labels green while the Line and Curve Labels remain yellow. And of course you can work your way all the way down to the individual Label Styles themselves where you can change each one individually if you choose. However, if you need to set many of your label styles to use similar settings it is much faster to move as far up in the Settings tree as possible and make a single global change. In this tutorial we used the example of changing the color of Label Styles, but that is only one of the options. You can set many other parameters this way including text height, text style, dragged state components and many more.