I am building a very simple four page website; actually, I hired a major hosting company to do it but they're core competency stops after loading text and images into pre-existing templates.
The top of my site has a hero image in landscape orientation. That displays just fine on a desktop, laptop, or tablet, but poorly on a phone. I need a separate image that can be called by phones that will display without terrible cropping that occurs now. Dimensions will cover the widest cross-section of devices?
I'm NOT a web designer, html programmer, ..... just a client who has to fix a provider's work.
Many thanks in advance.