trouble with nested conditions

Hello,
I've searched and searched but I must be missing something obvious:
I'm trying to create a rule condition exactly like this one:
[
But I can't figure out how to create/reveal this condition:

Here's my rule screen, and I can't figure out how to add that condition:

I'm sure that I'm missing something obvious. How do I create that condition?
Thanks!
I've searched and searched but I must be missing something obvious:
I'm trying to create a rule condition exactly like this one:
[

But I can't figure out how to create/reveal this condition:

Here's my rule screen, and I can't figure out how to add that condition:

I'm sure that I'm missing something obvious. How do I create that condition?
Thanks!