commande de marche arrière
/afiʃˈaʒ dy- ʁezyltˈa/
n
English: reverse slide change · 上一张幻灯片
English · reverse slide change中文 · 上一张幻灯片Español · mecanismo de retroceso y cambio de la diapositiva
Sens：Button that causes the previous slide to be projected on the screen.