The dimension styles library contains one pre-defined dimension style called Standard. This is the default dimension style used when you insert dimensions in your drawing. You can add and edit dimension styles to suit your needs.
When you edit the dimension styles library in your catalog, the dimension styles are saved with your catalog. When you edit the dimension styles library while editing inserted dimensions, the dimension styles are saved in the current drawing only.
To access the dimension styles library in the Catalog Manager:
Select File > Catalogs > Catalog Manager, or right-click an element in the catalog panel and select Catalog Manager.
In the Catalog Manager, select Libraries > Dimension Styles. The Dimension Styles dialog appears.
To access the dimension styles library through inserted dimensions:
Select the dimension in your drawing.
Right-click and select Properties, or select Edit > Modify Elements > Properties. The Dimension Styles dialog appears. This is your project-specific dimension styles library.
To access the dimension styles library through the Settings menu:
Select Settings > Dimension Styles. This is your project-specific dimension styles library.