I don't mean to change view modes, I mean to change fields' formatters arbitrarily by some roles under the same view mode.
Your question was a bit unclear.
But for what I understood, try in this page:
yourwebsite/admin/config/content/formats
To edit permissions of roles, go here:
yourwebsite/admin/people/permissions
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I mean formatters, not text format. Defaulty, only administrator can change field formatters on the "Manage Display" page. I'd like to allow some roles to change it on the entity view page. – fishfree Jan 8 '17 at 9:07
