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Graphics file attachment grows larger in the recipient's email message after you change to a high DPI setting

Original KB number:   3042197


Assume that you change the dots per inch (DPI) setting in Windows to a higher resolution, such as 125 DPI or 150 DPI. Then, in Microsoft Outlook, you send, reply to, or forward an email message that contains a graphics file attachment. In this situation, the graphics file image appears larger in the recipient's copy of the message than in the message that you originally sent, replied to, or forwarded.


This problem is caused by a change that was introduced in Microsoft Word 2010. Outlook 2010 and later versions use Word as the email editor.


To resolve this issue, install the update appropriate for your version of Office, and then add the DontUseScreenDpiOnOpen registry value by following the steps in the Registry information section.


Office 2016 does not require the installation of an update. However, you still must add the DontUseScreenDpiOnOpen value to the system registry for these versions.

For Office 2013, install Microsoft Office 2013 Service Pack 1 (SP1). For information about this update, see Description of Microsoft Office 2013 Service Pack 1 (SP1).

Registry information


Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

To add the DontUseScreenDpiOnOpen value to the registry, follow these steps:

  1. Exit Outlook.

  2. Start Registry Editor. To do this, use one of the following procedures, as appropriate for your version of Windows.

    • Windows 10, Windows 8.1, and Windows 8: Press Windows key+R to open a Run dialog box. Type regedit.exe and then press OK.
    • Windows 7: Select Start, type regedit.exe in the search box, and then press Enter.
  3. Locate and then select the following registry subkey:



    The x.0 placeholder represents your version of Office (16.0 = Office 2016, Microsoft 365 and Office 2019, 15.0 = Office 2013, 14.0 = Office 2010).

  4. On the Edit menu, point to New, and then select DWORD Value.

  5. Type DontUseScreenDpiOnOpen, and then press Enter .

  6. In the Details pane, right-click DontUseScreenDpiOnOpen, and then select Modify.

  7. In the Value data box, type 1, and then select OK.

  8. Exit Registry Editor.