How do you use the photos in email?

The email carries one dish, the one that can be booked this week, and it reads without zooming. It fails if the file is so heavy the message will not open on a neighbourhood phone. Write the subject with the dish name and keep the frame already cropped to a short width. In Madrid a collage of ten dishes goes out and nobody reaches the booking link. You get a light file of that week's dish, with the booking link beside it.