have all images auto size. There are 3 different image sizes

have all images auto size. There are 3 different image sizes. I am not sure how to resolve this. The tool is useless if we can display proper images, It looks very unprofessional. Why would a client trust us to build their website if we can display images in the correct size. If there is a work around for this can you please create a video and show us the work around. Thank you