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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.
Click the âFileâ tab on the ribbon and select âSave Asâ from the menu to open the Save As dialog box. Related Reading: How to Convert Read-Only for Excel 2007 to Excel 2003 to Make Changes. Step 3. Click the âToolsâ button and select âGeneral Optionsâ from the drop-down menu to open the General Options dialog box.tep 5. Add passwords if you want Excel to prompt for a password before allowing a user to open or modify the workbook file. If you want Excel to prompt for a password to open the file, enter a password in the âPassword to open:â field.