Auto-attacking Off/On
 

Is there a way to turn auto-attack off? It would be good if we had the option of changing it so that champs wouldn't attack the nearest random enemy when they come in range. Some people use the s button but it would be easier if auto attack could be turned off. The benefits are obviously better last hitting

Answer
 

It's called Hold Position, which is either "S" or "H" on your keyboard.