Slider tutorial - What's the best responsive way to set up a showcase slider?
Set the slider size
Go to the Slider settings → Size tab and set your slider size to be 300x400px.
Set the slide size
Go to the Slider settings → General tab and scroll down to find the Showcase slider type section. Set the Slide size to your slider size, which is 300x400px.
Set the slider's responsive mode
Go to the Slider settings → Size tab, scroll down and select the Full width responsive mode. Set the maximum slider height to the slider's and slide's height: 400px.
Configure the slider to your liking and add your content. Be sure to increase the visible slides value at the Slider settings → General tab under Animation settings. Probably 10 will do just fine. If you check the slider in your browser, you will see that the slides fill the whole browser. And when you reduce the browser width, the slides won't start shrinking but you will see less of them.