Hi welcome to RO,

I assume you've got the FX turned up on the appropriate channel and the FX Output Master. If you want reverb in the monitors the FX Return (and switch to choose Aux 1 / Aux 2) is in the upper left of the Master Section. There is a separate Effects Return for the amount of FX sent to the Monitors and the amount mixed into the Mains.

If you're not getting any FX at all, you might want to check/clean the footswitch jack.

Thanks, I got it working.
Jerry