Enemies detecting obstacles problem

[TheKruk666]

I know that there is a way to make enemies detecting objects or obstacles. I remember that I used something like:

"2 pixels above the top edge of enemy is an obstacle > change enemy direction to down"

But unfortunately i forgot what that was(I had some break from CTF2.5 for a while). Is it a build in option or some plugin?
Can you remind me what that was? Or if there is another way to do something like this?

[danjo]

its in the collision masks. checks for obstacle/ladder at a certain X,Y >> storyboard | collision masks

[TheKruk666]

its in the collision masks. checks for obstacle/ladder at a certain X,Y >> storyboard | collision masks

Yes! Thank you