Trench File
Use the Trench File tab on the Trench Database form to select and configure the trench deflection point file for your database.
Trench file
Specify the name of a file that contains the coordinates of your trench deflection points, enter field settings and optionally apply a filter in the Define Trenches pane.
Filter
Select the Filter check box and use the Select option to apply a filter to limit what data from the Trench file is displayed.
Trench fields (1 - 3)
Double-click to select the name of the field (or fields) that uniquely identify each trench.
East and North and Z fields
Specify the names of the fields in which Easting, Northing, and Z coordinates are stored in the Trench file.
Forms
Click the Forms button to select and open a saved form set, or if a form set has been loaded, save the current form set.
OK
Finally, click OK to save the properties of the database you are creating or editing.