Scaling and rotating images in Fabric.js is straightforward once you understand the use of the scaleX, scaleY, and angle properties on image objects. When you add an image to the canvas, you can change the size of the image by adjusting its scaleX and scaleY values. Increasing these values will make the image larger, while decreasing them will shrink the image. To rotate an image, you modify its angle property. This value is measured in degrees, and changing it will rotate the image clockwise or counterclockwise around its center. After changing these properties, always call canvas.requestRenderAll() to update the canvas and see the transformation take effect.