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1 In Excel, select â File â and click Save As. 2  Choose â Tools General Options â at the bottom of the window. 3  Select the check-box for â Read-only recommended â, then select â OK 4  â. Select â Save 5  â. If prompted, choose â Yes â to update the file with the read-only setting.f you have a file that is sensitive to changes, you can force Excel 2013 or 2010 to prompt the user to open as Read Only whenever they attempt to open the file. Hereâs how to enable this setting. 1  In Excel, select â File â and click Save As. 2  Choose â Tools General Options â at the bottom of the window.
Excel's save options include a check box that marks the file as read-only recommended, which helps prevent accidental changes. When you open such a file, Excel asks whether you want to open the workbook as read-only or not.Excel won't prevent you from altering the file even if you pick Yes, but when you save your changes, you'll have to create a separate copy.ny file on a computer can have the read-only attribute, which prevents programs from altering it. Unlike read-only recommended, files with the read-only attribute enabled don't display a prompt when you open them in Excel, as you can't choose whether or not to respect the attribute.