Enables the autosave feature, and controls the frequency of autosaving if enabled.
If this is set to some time interval, then every time this interval elapses, the game will automatically save. There are 8 autosave slots which are used consecutively, and they are independent of the main, manual save slots.
Note: The game will only autosave when you have control on the field.
Autosaves do not store screenshot thumbnails, in order to make the autosaving process as fast as possible. On most systems, it should be impossible to notice the autosave occurring.