Create Tasks Sequence

Tasks Sequence includes many sub tasks such as text task, images task and Gif animation task. These sub tasks run according as order and set time. Tasks Sequence and other top tasks are parallel running.
Select menu Edit|Add Group of Messages 'Sequence'. A tasks sequence will appear in list as following dialog.

Now, the new tasks sequence name Sequence1. Click change button to set active area for tasks sequence.
Select Sequence from list by click it, then select menu Edit|Add Message 'Task' to add task (Text task, Image task, or Gif animation task) to the tasks sequence. Or select a existed task in list and drag it to tasks sequence. For example, we add task2 and task3 to the Sequence1.