Choosing the image which is preview before entering the post

Hi Mahesh, thank you for your quick answer. Here is the website adress:

http://nicorapropiedades.com.ar/

As you can see, in the home page every post has its own “featured image” or “featured thumbnail” but I´m not able to select this image by myself. The theme seems to select a random image from the gallery but I would like to be able te choose wherever picture. Is there some proper way to do it.

Thank you for your time.

Hello! Thank you for your response. If i do so, the image that i would like to show does not appear, but when opening the entrance of the gallery it appears this image in a huge size instead of the header image. How can this be solved? I´ve tried this in the past and that is why i have discard this option.

However, if i post the images of the gallery in a certain order (updating them on that order, or changing it later on), the first photograph that appears on the post it is never the one on the preview of the blog. Then, trying to solve this i see that, for instance, the photograph shown it is the forth one, i tried changing the photograph i wanted to appear fourth, but then it appears other image when you see all the entrance, i´ve tried several methods, but all i can see it is that the image that you see is random, so i wanted to know if there is any way to change this.

If not, is there any other catch theme where i can see this solved?

Thanks,

Regards,

Dear Mahesh, thank you for your quick response. Maybe i did not make myself clear as i intended, sorry about that. I do not want or need that feature. I just want that the image that is seen as a thumbail before entering the post gallery type matches the first photo of the post. Because the thumbail that i get is random. How can i fix this?

Thanks,

Regards.