Sometimes we don't want to place some individual agents out for some reasons, we can block them place, just by 2 simple steps:
1. Place all agents out from placement node, and select the ones you dont want to see again.
Select some agents you don't want to see again
2. Click Miarmy > Placement > Mark Dead Selected Agents, and these agents info will be stored inside place node. Then our system will deplace agents again.
Some agents won't be placed any more