Locking text boxes is a great way to protect specific content in your document from changing, either accidentally or intentionally. Here’s how to lock your text boxes in Word.
Locking Text Boxes in Word
Let’s say you’re working on a document that other people on the same network have access to and you want to lock your text boxes, so they don’t get edited by mistake.
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To make this work, we’re going to need to use the tools provided in the Developer tab. The developer tab is hidden by default, so go ahead and enable the tab to appear on the Ribbon if you haven’t already.
Once you have the Developer tab enabled, go ahead and open up your document that has the text boxes you want to lock and switch to the “Developer” tab. Here, select “Restrict Editing” in the “Protect” section.
Note: The Restrict Editing option is also available on the Review tab, but only appears if you have enabled Developer tab.
A Restrict Editing pane appears on the right where you can restrict editing permissions for all, or certain parts, of the document. Here, check the box next to “Allow only this type of editing in the document” in the “Editing restrictions” section, then keep “No changes (Read only)” selected in the drop-down menu in the same section.
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Source : How to Lock Text Boxes in Word
