i g h t Changes width and height of all the slides. You can use units: p x (default), c m , m m , i n , p t , and p c . < ! $ w i d t h : 1 2 i n > $ s i z e Changes slide size by presets. Presets: 4 : 3 , 1 6 : 9 , A 0 A 8 , B 0 B 8 and suffix of p o r t r a i t . < ! $ s i z e : 1 6 : 9 >