Each task has an associated parameter dialog, which can be used to enter the values of parameters and run the task. The parameter dialog is opened by selecting a task from the `Task' menu.
The following parameter dialog illustrates some of the basic parameter types. Each parameter type has a corresponding widget type. For example, a boolean parameter is entered using a check-box; a choice parameter is entered using a pop-up menu to select from a set of options; a filename parameter is entered as a string, with the option of popping up a file browser by pressing the `..' button (see section 3.7).
If the task has a large number of parameters, the dialog may have scroll-bars. The scroll bars will disappear if the size of the dialog is increased sufficiently.
Further information on a parameter can be obtained by placing the cursor over the parameter widget. This causes a yellow tool-tip to pop-up if the parameter file defines a prompt field for the parameter.
The parameter dialog has the following buttons:
| Run | Run the task with the selected parameters |
| Defaults | Reset parameters to their default values |
| Cancel | Close dialog without running task or changing parameters |
When a task has been run, the parameter values are retained until the next time that the task is run (within the same session). The Defaults button may be used to reset the parameters of a task to their default values. The `Task' menu provides an option "Revert to defaults" to reset all the parameters of all tasks to their defaults.
