How to put resource conVersions on repeat order?

[Kamog]

Is there a way to put resource conVersion on repeat order so that X organics and Y radioactives get converted to minerals each turn? I seem to recall discussions in the forum about people automating conVersions and forgetting to turn it off, which caused problems with retrofitting because it used up the stored resources. But how do you turn it on in the first place? I couldn't find the menu or button to do that, please help. Thanks!