When replacing pictures, here are a few helpful notes on sizes that work well for areas of the template.
(1) Header Image – This area will adjust to any size/shape image but best practice is to make sure you load a high quality (wide) image to fill the space similar to the demo.
(2) Gallery Images – these images can be any shape that suits your needs. You will find that it works best to have all images that are similar in shape/size to retain the consistency & shape of the gallery.
(3) Background ‘Call to Action’ Image – almost any image (shape/size) will work here. A larger image (at least 1000px wide) will offer the best quality when it is stretched on larger screens.