I'm creating a custom field called "hero headline" and it's something that will be used across multiple Field Groups.
But, after I saved, I can't seem to find it again? Do I need to re-create 'hero headline' for each Field Group? I'm used to the way Toolset does things where after you create a custom field, you can re-select it again later on. I'm sure I'm just missing something obvious...
The Builder supports using a field group for multiple post types, see my screenshot. If you want to use a field in multiple field groups, you should re-create that field in each field group.
It's easy to reuse a field by coding, just copy and paste the field code to another place. But thanks for the idea, I will discuss with the developer team to create a new feature that supports the Builder to make a field reuseable.