Click the Insert Column button to the right of the Columns box.
Type the name of the column in the Name column.
Use a name that reflects the name of the attribute or recordset field to keep
the table column and the attribute or field closely linked.
Select the data type for the column by clicking the down arrow at the far
right side of the Data Type box to display the data type list. The
options are Integer, String, or Float.
If required, specify the column's minimum and maximum properties in the
Column properties minimum/maximum boxes.
To identify a column as the key, select the Key box.
Enter a description of the column in the Description box.
