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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 absolute cell reference (with $ sign) An absolute reference in Excel is a cell reference with the $ sign, like $A$1. The dollar sign fixes the reference to a given cell, so that it remains static no matter where the formula moves. In other words, using $ in cell references allows you to copy the formula in Excel without changing references.