Right now, the HIDE FIELDS only hides fields based on some conditions.
It would be very interesting if you could HIDE and/or BLOCK (gray out) fields.
Because sometimes, in a next step of a process, you need people to SEE information previously inserted (so you don´t want to hide it), but not be able to edit it.
I think the same interface of the hide field could be used.
You choose the tab.
Then You select fields to hide and conditions.
The improvement is that below you would have “Select the fields to Block” and then the conditions.
Just remembering it has nothing to do with permissions, but with conditions (example, if field Status is equal to “DONE”, blocks all fields to edit, except field with trick button “Return”