Hello.

I need to enable "Display Settings" for articles ("Item view options") in frontend editing form. In current situation authors have only basic options when Toogle sidebar (Publishing status and Metadata information) in frontend, but no access to "Item view options".

Can I enable this option in frontend editing and addin articles?

You can completely hide the sidebar from K2's settings by selecting hidden in the "Default state for the item form sidebar" param in K2's settings.

Alternatively you can override the itemform.php file are remove the sidebar and the toggler altogether.

More on overrides can be found here: getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates

Thank you for reply. Problem is that I dont want to hide sidbar. As I said before, I need to enable "Display Settings" for articles ("Item view options") in frontend edit form like it shows in backend.

You can use overrides as per @Krikor advice to CSS hide the parts you don't want to display on the frontend, you can check whether the form is loaded on the backend or the frontend using this: