How do I add multi-attack for a Custom Monster

[MNBlockHead]

I am using the Custom Monster in the new release of the SRD, and it is great! Much easier than trying to do this through the editor! But I can't figure out how to add the "Multiattack" action to a custom monster.

I'm sure I'm missing something obvious, but I just can't see anywhere to add this.

 

[MNBlockHead]

It should be a racial ability, correct? That is where I see multi-attack for other monsters. But when I go to add a racial ability, the fields and options don't seem to fit.

 

[daplunk]

I just use Racial Ability.

 

[MNBlockHead]

Okay. That works.