I've reread the post several times after my reply and honestly make no sense out of it but it was fun to read.
Yeah I use a dish tool but guess this person is talking more about checking the "trueness" of the wheel and is new to it.
Just be sure to check the tension of all the spokes before starting any truing project...if not done correctly you can wind up really messing up.
If you're not sure do a search on google. I'll bet there are quite a few videos on wheel truing on a bike, stand, etc.