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How to make user be able to view all fields
I remember years back, when I give "View All Data" or "Modify All data" system permission at the profile level, it will automatically give all FLS. but when I check today, it seems only give object level permission, we still need to manually check all FLS for all objects. is there a easier way to grant all FLS to profile?
https://help.salesforce.com/articleView?id=000321298&language=en_US&type=1&mode=1 (https://help.salesforce.com/articleView?id=000321298&language=en_US&type=1&mode=1)
and to your actual question: I don't know of a way to grant a profile Visible access to field level security on a field without doing it on a field-by-field basis.
https://developer.salesforce.com/forums/?id=9060G0000005hnvQAA