Hello. When I click on a cell where the formula is =HYPERLINK("MyPicture.JPG"), it is IE which opens the picture. However, in Windows Explorer, .JPG extension is specified to be linked with "picture and fax Windows viewer" (translated from the french name, I do not know the US standard name for this sub-application of Windows Explorer). Is there a way to change that in EXCEL (or in all Office applications) ?. Note that .BMP files are opened with the Windows Explorer viewer - which is quicker and simpler -. I use EXCEL 2003 SP2 with Windows XP SP2. Thanks. -- Noel