Adjust size of home page featured image

I would like to adjust the size of the homepage featured image. I have tried just about every method listed in the forums with no success. I have adjusted the image size in the theme editor and force regenerated the thumbnails. I’m afraid I’m stuck and need additional guidance.

Hey there

Can you please tell me how do you want to decrease it? the screenshot will help in this case

I would like to increase the featured post image so that the entire image is shown on the featured image posts on the home page. I was thinking 818x1170. I essentially, I do not want the cropped feature images on the home page to be cropped. See attached. Is that what you were looking for?

Hi Mmarlin
Sorry but im afraid this is not quite possible this is default function in the theme and without modification of the theme files this is not possible, unfortunately, it can not be resolved only with CSS code