Is there any place where we configured, because of which properties are getting stored in etc folder?
Hi, The design_dialog properties are saved in etc because values can be shared at the template level. If values store in the content page then sharing would be complex.
with dynamic templates, design_dialog values are stored in the form of policies inside the conf folder.
You can change only via overriding the OOTB code but is there any special requirement to change the storage location?