There's a "read only" option in the fields management dialog.

 

I thought that read only only prevented user to manually populate the field, but I just realized that not even an "in field" equation will write to the field when "Read only" is ON...

 

I'm surprised. Has it always been working this way ? And how can I only block manual user entries in a field but allow normal equations

operations ?

 

(I have a few fields with a "= anotherfield" equation (mainly for fields that had changed names without me being aware of it and I didn't want to transfer all the data... for equations reasons, etc.))