The candidate pool in the Prop Distribution panel lists all the items for random placement. You can add, delete the props and also set the ratio for the likelihood of the prop being picked for deployment.
There are two methods to import props into the candidate pool:
Remove one or more selected props from the pool.
Clear all props from the pool.
You can set the frequency of deployment by entering a number for the props.
The ratio for the two props is 1 : 1.
The ratio for the two props is 1 : 4.