Hi I'm working on setting up a blog, and I will be posting from the frontend via my smartphone. I have problem with popup window which I'll post in when I use the mobile, is there any solution to this? I get up window but it's too big, go missing options in it.

Hello Remie,

You can override the itemform.php styles to make the form responsive.
I would recommend ditching the modal and using instead a normal menu item.

Where is the original itemform.php and what would the override path be?

This one is empty: /components/com_k2/views/item/tmpl/itemform.php

K2 v2.6.8 on Joomla 3.3

@modernmagic

Look at /components/com_k2/templates/default/itemform.php .