Changing context/layer within a sandbox

Summary

Changing context/layer within a sandbox

Content

Hello -

Prior to the unified sandboxes, you can change between contexts and layers.  Is there anyway to still do this in the unified sandbox?

Requirement:

> We have Person EFFs that we only make available for specific countries

Solution prior to unified sandbox

> Open Sandbox

> Set context to site

> Hide all country specific Person EFFs

> Change context to country

> Make Person EFF available for the country (will repeat this for each country)

Will this not be possible anymore and each  country need to be opened as a separate sandbox?

Version

19D