I created a slide library and the default template is PowerPoint .ppt extension, and I see no option for changing at the time of creation. I need to change the template to .pptx and when I do this I get this error: "Edit Document" requires a Windows Sharepoint Services compatible application and Microsoft Internet Explorer 6.0 or greater" I have Office 2007 and IE 8. I can create a document library and choose .pptx as the default document but I then lose the function of a slide library such as a thumbnail column and I see no way of putting that back in. Thanks in advance for any help you can give. Ted

Hi Ted, According to your description of the problem, maybe you can take attention to those that are as follow: 1. The default template for a document library is located in the Forms folder. In many cases, it is called template.doc, unless you changed the default type of file. You can get more information about it by clicking the “Learn how to set up a template for a library” link on the “Document Library Advanced Settings: Slide Library” page; 2. There are not any template files in Forms folders of Slide Library. So the slide library does not have default template; 3. If we want to specify a .pptx template for a slide library, we can try to add a template.pptx file in Forms folder of the slide library. You can check the testing result using the link: http://cid-76754da9a5b3e22a.office.live.com/view.aspx/Document/change%20slide%20libraries%20default%20template%20.docx Hope it will be helpful for you! Regards, Cindy