Setting multiple word targets

I’m using Scrivener for Windows and find the word targets really useful. However, it would be useful if targets for multiple documents could be set after they’re created instead of one at a time. I tend to plot all of the scenes in a novel but can’t set an average scene word target from the project target until I know how many scenes there are. Recently, I’d created 75 scenes then had to put the average word target on each of them individually. I understand I can set a template with a target at the start but that still doesn’t help. Any chance of this feature (or is it already possible and I’v missed it)?