Hello,
How can I display items from one category like gallery with next and previous buttons ?
For an example, category pats has items cat,mouse,dog. When I open mouse I want next button to show me a dog and previous for cat ? :)

It doesn't have to be like gallery, just to can move from one item to another in one category

Hi. You can move through items in category using "Item navigation". Go to the category settings and enable the relevant setting.

I can't find that option to enable it :(

Angie wrote: I can't find that option to enable it :(

I found :)

When I click on item picture, it shows like gallery, how can I enable two buttons to move next and previous.

Or , is there posibillity to move "More in thic category" on top, above picture, to be easier for user to see that option exist

And can I enable,in some way, when I type on keyboard next or previous , to work ?

You can only move it on top. Make a template override to the item.php and move the "Item navigation" block wherever you want. Information about template overrides can be found at getk2.org/documentation/tutorials/item/174-templating-with-k2-and-the-concepts-of-sub-templates