| iTool User's Guide: Visualizations |

## Modifying Existing Visualizations

Once you have created your visualization, you can modify it as you wish. Use the Parameter Editor to modify parameter data.

### The Parameter Editor

The Parameter Editor is very similar to the Insert Visualization dialog. It shows the data tree view and parameter property sheet and parameter data types window.

If you have already created a visualization, you can change the data associated with one or more visualization parameters using the Parameter Editor. To display the Parameter Editor, select your visualization, then select Edit Parameters....

Figure 3-2: Parameter Editor

Figure 3-2: Parameter Editor

Note The Parameter Editor contains all of the fields shown in the Insert Visualization dialog, with the exception that you cannot change the visualization type of the selected visualization. See Inserting Visualizations for details.

To associate data with a visualization's parameters using the Parameter Editor:

1. Select Edit Parameters.

2. Do one of the following:

- Select an item already in the Data Tree View.

- Click Import File to import a file into the Data Tree View, and select the file.

- Click Import Variable to import a variable into the Data Tree View, and select the variable.

3. Assign items to the appropriate input parameter and data item, then double-clicking or by selected the down arrow just below the Data Tree View.

4. Click Apply to apply your new changes or Dismiss to close the Parameter Editor.

Note The Apply button will not be available unless all required parameters have been assigned within a visualization.

### Removing Data Associations

Once a visualization has been created, you can always remove associations within the parameter editor. Select the parameter in the parameter property sheet and click the X button between the data tree view and the parameter property sheet.

Note If you remove a required parameter, you will not be able to apply your changes until you select a new data item for that parameter.

### Replacing Data Associations

To replace the data associated with a given parameter, select the parameter in the parameter property sheet, then select a new data item in the data tree. Double-click or click the down arrow button to replace the data associated with the selected parameter.

IDL Online Help (March 01, 2006)