special effects selection dial
/ˈspɛʃəl ɪfˈɛkts sɪlˈɛkʃən ˈdaɪəl/
n
English · special effects selection dial中文 · 特效选择旋钮Español · ruleta de selección de efectos especialesFrançais · molette de sélection des effets spéciaux
意味：Dial used mainly to select the special effects to be applied to an image, including color reversing, horizontal or vertical stretching and mosaic tiling.