How to enable grouping of cells in Google spreadsheets that are shared?

Question

Google Sheets

Hello.
Here is an example of a common document Sheets - Groups in which the grouping of cells is made. Only it doesn't work and there is no way to collapse/expand groups, since this document is in the public domain.
How to set up cell grouping so that it can be used even when the document is in the public domain?

Answer 1

Make access not only to view, but also to edit . This will help.