A reader writes to ask:
I have a children's fiction novel. Once the second chapter starts, do I type the chapter at the top of the next page or 1/3 of the way down, like mid-way the page?
Start the second chapter (and every subsequent chapter) on a new page on the same line where you started the first chapter. I start about halfway down the page, but how much blank space you leave above the chapter heading isn't as important as being consistent about it throughout the manuscript.
For an example of novel formatting, see my sample partial novel manuscript.