To Import Text Styles from Another File or DGN Library

From the Text Styles dialog's Style menu, choose Import.
The Text Style Import dialog opens.
From the list box, choose the DGN, DGNLib, or DWG file containing the text style to import. Click OK.
The imported styles display in the Text Styles list.

Note: All styles from the selected file are imported; if some styles are not required, delete them after importing.

If a text style in a DGN library changes, local text styles based on the text style library are not automatically updated.