Hi,
Please tell me where I can customize the size of the lightbox popup voor K2 extra fields?

In the settings of extra fields for the K2 item, you can select a link and open it in a lightbox popup.
Settings for extra K2 popup fields values works only for the "Classic JavaScript popup" option. Using the option "Lightbox popup", I get a full-screen lightbox.

Dear dutchman

you can take a screen help me?

Thanks

Hi, I sent a link with an example.
If you click on 'WATCH MOVIE', you get a full-screen lightbox. I have not found anywhere option to customize the popup lightbox window size.