You can run the selected idle task by clicking the Run button. Upon running, the status of the task will be changed from “Idle” to “Running” with the progress bar and the current percentage of the task's completion.
Note that you can only view task logs (see "Viewing task logs" section) and Cancel (see "Cancelling a task" section) the active running task. Other control buttons – Run, Edit and Delete – are disabled. In order to edit or delete the active task, you have to stop it first.