Opens a window with a graphical display where you can specify the mapping of input columns to output columns. The graphical mapper displays sample rows of the input data to help you map the columns. You can set the length of the columns, set null values, and associate input and output columns using graphical controls. Mapping done in the tabular mapper can be seen in the graphical mapper.

Specify the start and end positions of the input data columns by clicking on the ruler bar. Each click creates a divider between the columns. Use the sample input data as a guide in determining your start and stop positions for the input data columns.

Specify the position of a null indicator by clicking on the bar. A null indicator icon appears. You can have only one null indicator in an input data column. Use the sample input data as a guide in determining the positions of the null indicators. Use the null indicator icon popup menu to associate a null indicator with a target column.

Associate the input data column with the target table column by clicking on the bar. From the drop-down list, select the target table column that you want mapped to the input data column that you specified on the Input column boundaries ruler bar. Use the sample input data as a guide in determining your start and stop positions for the input data columns. (Sample data is displayed if it is available.)

Shows sample date. Use the sample input data as a guide in determining your start and stop positions for the input data columns. (Sample data is displayed if it is available.)

Specify how many characters to read from the data file. The default is 80.

Retrieves the specified number of characters from the input data and refreshes the graph with the data. The length of the graph is changed to match the length specified in Specify the length of each record in the data file.

Select the target table column that you want to associate with the null indicator.

Shows a moveable marker to indicate the start and stop positions of adjacent columns in the input file. Each marker indicates the end of the previous column and the beginning of the next column.