Please go through this guide https://www.odoo.com/documentation/13.0/reference/security.html

@mohammed, I am already familiar with the options for security. My question is specifically about showing accordions i.e. collapsible sections for form content. I am unable to find any resource on this. The security aspect of it is an add-on to that, in that I want the default states of the collapsible sections (i.e. expanded or collapsed) to be determined by the user's group. Hope this is clear.