abilitys to hero abilitys

ok i never acturally tried the TFTWE custom ability editor and i was wondering how do u get abilitys like slow to be a hero spell? i mean if u make a new custom spell and make it slow u cant change it to hero...

I think theres a field that says something like "hero ability: True/False" and you set it to "true" to be a hero ability.

got it to work thx alot:D