Hi @JimBarber. Thanks for being part of GoDaddy Community! It's not possible to change the size of the image placeholders in a GoCentral Website Builder plan. Sorry However, there are different layouts for each section type. Perhaps one of the other layouts will work better for your text.
JesseW - GoDaddy | Community Manager | 24/7 support available at x.co/247support | Remember to choose a solution and give kudos.