In Toolspace, on the Prospector tab, expand the surface Definition collection, right-click , and click Add.
In the Add Breaklines dialog box, enter the breakline description in the Description field.
Select From File from the Type list.
Select the file link option.
Maintain Link To File. Reads the breakline from the FLT file when they are added and when the surface is rebuilt. If you edit or delete the source FLT file, the Import Breakline File operation is marked as out-of-date. With this option, you cannot list individual breaklines, view them in the Breakline Properties vista, or import them into the drawing.
Break Link To File. All breaklines in the FLT file are copied into the surface as Add Breakline operations. The FLT file is no longer referenced. When you rebuild the surface, the internal copy of the breakline is used. The breaklines have the full functionality of other breakline types. You can see the breaklines listed in the Breakline Properties vista, you can pan and zoom to them, and import into the drawing.
Click OK.
The Import Breakline File dialog box is displayed.
Select the file to import. It must have an .flt extension.
The breakline is created and added to the surface Breaklines collection in the Prospector tree.
Note: The breaklines are imported and grouped by type according to their order in the .flt file.