Show K2 uploadet images

hi,

first my englisch is not so good, sorry for that.

how can i display images from k2 articles, which i have uploadet? i dont mean the images which i have normally in the article.

for example:
i have an k2 article only with text and i have uploadet an image for this article. now the k2 component makes some different sizes from this image (XL, L, M, S,). how can i show some of them?

i use news show pro gk4

please help...