Creating a cloned field group
The clone field allows you to select and display existing set of fields. It does not duplicate any fields in the DB, instead, it loads and displays the selected fields at run-time.
The clone field may be used in one of two ways. It can replace itself with the selected fields (seamless) or display the selected fields as a group of sub fields.
In helium project there are several set of fields that are being reused often times, for which we use cloned field groups.
In order to create a cloned field group first follow steps in Creating an acf field group chapter on how to create a field group.
After creating desired sets of fields, below Location section in Settings set option Active to NO. This ensures that field group is not visibile on any CPT (pages, posts.. etc) even if in Location section there are certain post types specified.
After these steps, this field group can be cloned in another field group using "Clone" type field under Fields section when user needs to select specific field group.