You can change any point file format that you create. You can also change most of the point file formats that are supplied with AutoCAD Civil 3D.
A point file format cannot be changed if 
is displayed to the left of its name in the Prospector tree.
- In Toolspace, on the Settings tab, expand the Point File Formats collection.
- Right-click the desired point file format. Click Properties.
- Do one of the following:
- If the format is a point file format, use the Point File Format dialog box.
- If the format is a user point database format, use the User Point Database Format dialog box.
- Click OK.
