Hi

Looking for a way to add a subtitle field without using extra fields.

Ideally have it under Title field in backend and under the Title on frontend.

I understand it requires hacking core K2 and willing to pay if anyone is interested.

Thanks

It doesn't require hacking. You should use a K2 plugin instead.

This example plugin is a great way to start. getk2.org/extend/extensions/90-example-k2-plugin-for-developers

Hi,
Please contact me if you still need help.

Thank you