I have created a form using a table which I have modified as needed - cells for titles and cells for data entry. I have setup data entry cells using Developer tab - text or date.
I now want to lock the title cells so that they cannot be changed whilst allowing data to be entered into the data cells.
I can find various YouTube and text answers but they all vary slightly or refer to header bars that don't contain tab I need or just look different.


I am using the latest version of Word 365. Can anyone point me in the direction of an up to date tutorial on the subject, or step by step instructions please.
A particular irritation is that I somehow managed to get part of the form working as I want - titles locked, data fields open - but I don't know how I managed it so can't do the rest of the form!