Multiple choice technology operating systems Key to select all cells that contain comments CTRL+SHIFT+O (the letter O) CTRL+SHIFT+ 0 (Number Zero) CTRL+SHIFT+C None of the Above Reveal answer Fill a bubble to check yourself A Correct answer Explanation CTRL+SHIFT+O (the letter O) is the Excel shortcut to select all cells containing comments in the current worksheet. This is useful for reviewing or managing annotations. CTRL+SHIFT+0 (zero) has a different function (unhiding rows).