Although this isn’t something that you can do within Atomic Scribbler, there is a workaround. Within Word, right-click on your Chapter heading style and select Format (bottom left), then paragraph and then the ‘Line and Page break’ tab. Put a tick in the ‘Page break before’ box.
Also, from that Format option select Font and adjust the size, colour, and typeface.
When you are working through your document, find each chapter heading, double click on it and select the Chapter heading style. Not only will you now see your chapter heading as you want it, but doeing this will automatically pop in a page break beforehand.