hello,
i have set image size to medium and medium size 300 px but when I click in frontend on item to open. It opens image XL size. It expand original size to larger.
Where is possible to change this?
I have set in category options how to open it and everywhere i put on medium.

If any, any idea, I would appreciate it

thank you.
z

Try the item.php inside your K2 button.
The links that open up in lightboxes have "modal" CSS class so you try searching for that.

problem was in k2.css - parameter: min-width:100%
Of course is not right, may be it's bug, or it is for other purposes 100%, same as max width.

br