To Add a Title Block Extension to an Existing Title Block (AutoCAD Mechanical Toolset)

Extension title blocks are available only for drawings based on the GOST standard.

1. In the drawing area, double-click the title block you want to add the title block extension to.
2. In the Title Block section, click Extension Title Blocks.
3. In the Extensions Title Block dialog box, click the extensions you want to add to the drawing. When you click the extension, the drop-down list becomes available and a default extension type is selected.
4. To change the extension type, choose a different extension type from the list.
5. Click OK.