In the Folders view in the left pane, right-click the task and click Add Command.

In the Folders view in the left pane, select the task and click the Add Command toolbar button.

When you create a task, you automatically get a command in the right pane. Press Tab to move from parameter to parameter. If you keep pressing Tab, a new command is automatically added to the task.

Right-click an existing command and click Add Command.

Right-click in the whitespace under the existing commands and click Add Command.

Select the task in the Folders view in the left pane. From the File menu click Add Command.