How to get particle effects to show?

[Rackrunner]

My son turned off his particle effects off about a year ago and now he can't get them to turn back on.

Can someone show us the command to get that to work? He has all the settings turned up to max, still nothing. So it must be where he turned them off.

Thanks.

[Savok]

/showspelleffects on

[Chump]

That worked, Thanks Savok!