dazzling main image - text

hi i would like to ask you. How can I set up text into the image in the main page. As it is in the demo. Text in the green and grey box please? I can put there some text but only under the picture not into the picture. Here you can see how it is shown on my page www.salatvlitomericich.cz Thank you for your help I am stucked at this point.

Hi @vlasta,

I hope you are well today and thank you for your question.

You will find information about this on the following page in the sections “Call for Action” and “Widget Areas”.

Best Regards,
Movin