Hi all,
K2 by default resize the images by width is there any way to change it to height?
I did few tests at css to (catItemImageBlock) but the images don't look good.

Any help/guidance will be much appreciated...

No. There is no such setting.

Lefteri I know there is no such a setting although can you advice in which file I can change the resize from width to height?

Try to change file /administrator/components/com_k2/models/item.php line 338 from:

to :
I am not sure if it will work. If it doesn't take a look at the library K2 is using for resizing at www.verot.net/php_class_upload.htm . Finally note that since this is a core hack you will lose it in future updates and of course you cannot get any further support.