The theme optimizes images by default with a custom Hugo’s markdown render hook:
The theme creates resized versions for each image, ranging from 100 to 700 pixels wide. It generates WebP versions for each size if the original image format isn’t WebP. The theme keeps the original file format as a fallback for browsers that don’t support the WebP format. Images in SVG format are embedded as-is. Blog Post Cover Images # Use the front matter of your posts to add cover images: