How to resize slider images for Dazzling WordPress theme

In my website, featured image resize mi image.
What can i do?

Original size uploaded is 1920x
But it is resized to 1028x

Hi @raulgs82,

I hope you are well today and thanks for posting here.

I tried to visit your shared site several time to test it but it’s just displaying the following error message so i couldn’t access it.

This webpage is not available


Could you please make sure that the site is accessible so that i can test it?