Autosave/autoload (place this in Story Javascript):
config.saves.autosave = true;
config.saves.autoload = "prompt";
Save game to a certain slot (place this at the top of the passage you want to save in):
<<script>>Save.slots.save(slot number)<</script>>
Link to load game:
<<link "Load Game">><<script>>Save.slots.load(slot number)<</script>><</link>>
(slot number) is replaced by the number of the slot you want to save in brackets minus one. To save to slot 2, for example, use this code:
<<link "Load Slot 2">><<script>>Save.slots.load(1)<</script>><</link>>