Q: How can I hide early morning hours in iCal?

how can I hide early morning hours in ical??? i'm sleeping at those hours and i really don't need to see them. it would give me a lot more space to see what really matters if i could define myself what hours i would like ical to show. i saw an old post that is locked and doesn't help. also searched the web and didn't find anything. i would be great to solve this very annoying problem. thanks!