ALT COPD is sometimes also called emphysema, chronic bronchitis, or chronic asthma. Many people with COPD experience a sudden worsening in breathlessness that is frightening, sometimes leading them to call an ambulance or go to the Emergency Department. Sudden breathlessness can sometimes be a symptom of a COPD 'exacerbation' that requires medical treatment. However, at other times, it may be caused by factors like exertion or changes in the weather, and can be self-managed using simple strategies like breathing techniques and a hand-held fan. Breathlessness action plans are easy-to-follow, step-by-step guides on what to do when breathlessness becomes suddenly worse. They differ from COPD action plans that focus on managing an exacerbation using medical treatments. This project will co-design an optimal breathlessness action plan to complement the Lung Foundation Australia's COPD Action Plan at https://lungfoundation.com.au/resources/copd-action-plan/