I’m trying to avoid resizing at the point the browser renders the page. And, I’m also wondering how to make changing layout sizes more efficient since image sizes may change. To that end, what’s the most efficient approach? I’ve been manually setting Media Sizes in WordPress but is that the right way for a responsive theme? Is there a GP function that creates appropriately sized images based on GP’s layout and the size at which it’s being viewed? If so, am I better served by leaving Media Sizes in WP blank?