How to always display events

Hello,
I have different ways to show / hide events based on specific fields. Now I want to make sure that I always show certain events regardless of the active filters. How can I specify constraints to force these displays?
Thanks!
Denis
I have different ways to show / hide events based on specific fields. Now I want to make sure that I always show certain events regardless of the active filters. How can I specify constraints to force these displays?
Thanks!
Denis