Can someone provide an example for the im edtitype commmand?

Hi.

I would like to have an example of the "im edittype" command to remove the overridden description in the 'Overrides for Fields" for an item type.

I wasn't able to figure this out from the "im edittype -?" information. My search for documentation has come up empty. And my trial-and-error experimentation has failed.

Can someone provide an example, or point me to documentation?

Thanks...

-Sean