Excel: How to highlight cells that contain question mark
In Excel, the Conditional Formatting feature is frequently used to highlight cells that contain the specified character. Now, here introduces how to use the Conditional Formatting feature to highlight the cells that contain question marks as the below screenshot shows.
Please follow the steps below to highlight cells than contain question marks.
Note: the methods provided in this tutorial are tested in Excel 2021, there may be some different in different Excel verisions.
Highlight cells that contain question mark/h4>
1. Select the cells in which you want to highlight the cells that contain question marks.
2. Click Home > Conditional Formatting > Highlight Cells Rules > Text that Contains..., see screenshot:
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3. In the Text That Contains dialog, type ~? into the textbox, then click the arrow down to choose one format you want to use for the cells containing question marks. 
If you choose Custom Format, you can customize the format as you need in the Format Cells dialog.
4. Click OK. Then the cells that contain question marks have been highlighted.
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How To Conditional Formatting Cells That Contain Symbol in Excel?/a>
Conditional Formatting feature is used to highlight cells that contain specified characters, but for highlighting cells containing any symbol such as question mark (?), or exclamation point (!) as the below screenshot shows, the built-in feature cannot directly solve the problem.
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