To import user-defined property values into the drawing and assign them to points
In the drawing, define the properties within the User-Defined Classification.
Define a point file format that contains columns with the user-defined properties. The point file must have a column containing the point identity, either Name or Number, that identifies which point is assigned the user-defined property.
Click Home tabCreate Ground Data panelPoints menuPoint Creation ToolsFind.
Click the Import Points button.
In the Import Points dialog box, select the point file format that contains the user-defined properties. For more information, see Importing Point Data.
To export user-defined properties
Click Output tabExport panelExport PointsFind.
In the Export Points dialog box, select the point file format that contains the user-defined properties. For more information, see Exporting Point Data.