Function:

• enter the event you want to do and press "+"
• click the bracket at the top to set all events to be done or not complete
• click the other brackets to set the corresponding event to be done or not complete
• press "x" to delete the event
• press enter to save the current changes
• press esc to cancel the current changes
• click on the place out of focus would save the changed event/delete the empty event
• click "Delete All" at the bottom to delete all the events