Hello,
i have such additional fields like Webpage/URL. User in front-end can enter Text of the link, URL and
(A) choose the option where/how the link will be opened.
Is there any possibility to disable in front-end "Article management" the option (A) to don#t allow the user to choose the way how the link will be opened (target new window, same window etc.)?

Actually i have selected in K2 backend the default value "to open url in new window" and would like to have it unchanged by any other user in front-end.

I assume this need cannot be done via configuration of K2 in back-end and that i have to modify some core files - could you please give me a hint which file would be the proper one?