Loss of image quality after you save in Word, Excel, or PowerPoint 2007


Symptoms


After saving a document, spreadsheet, or presentation which contains an image, a loss of image quality such as blur may occur.

Cause


This issue occurs because PowerPoint, Excel, and Word perform a basic compression of images on save.

Resolution


It is not possible to recover pictures that have already been compressed.

For future saves, compression can be disabled on a per-file basis using the following steps:

  1. Click the Office Button, and then click Save As. 
  2. Click Tools, and then click Compress Pictures. 
  3. Click Options. 
  4. Click to clear the Automatically perform basic compression on save check box. 
  5. Click OK. 
  6. In the Compress Pictures dialog box, click Cancel.
    Note:  Clicking OK on this dialog will not prevent the issue from occurring.

 You can also modify the following registry setting to prevent basic compression from occurring by default.

 Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:

322756 How to back up and restore the registry in Windows


WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

1.

Quit all applications.

2.

Start the registry editor. To do this, click Start, click Run, type regedit in the Open box, and then click OK.

3.

Browse to the following registry key:

for PowerPoint:

HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\PowerPoint\Options 

for Word:

HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Word\Options 

for Excel:

HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Excel\Options 

4.

Create a new DWORD value named AutomaticPictureCompressionDefault.

5.

Make sure the value for the registry key is set to 0.

6.

Close the registry editor.

More Information


PowerPoint Help and How-to: Reduce the file size of a picture

http://office.microsoft.com/en-us/help/HA101922001033.aspx