How to send reverb to monitor?

OK I am a guy that goes to a church that my pastor basically runs our Allan and Heath QU 32 board. He has been trying for a long time to do one thing…he needs to know how to run reverb to the monitors on the board. He said he has tried looking at the manual, youtube videos, etc. to find this out and that it should be simple…yet he said he cannot find out how to do it? I told him I would ask here to see if anyone can offer a step by step on how to do this? I know for some of you that may sound simple, but he has been trying to do this for awhile now and he just does not know how. He can get reverb or any other effect to the mains…he just does not understand how to get it to the monitors? I figured I would ask here for him. Can anyone help?" Thanks.

not again… use the search we discussed this or similar problems twice a week during Corona

there many posts about this

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