I use Parent / Child account relationships.

I'm trying to use a conditional layout if the Parent Field is empty but the "Parent Field" is not an available option. 

Any chance it could be added?

My Scenario

On my Parent Account I show a section with all "Related Sales Orders" for all the child (member) account sales orders.

I do not want this "Related Sales Orders" Section showing if the account is not a parent account as it is redundant.