Attachment Reports offer the additional option to extract the thumbnail image directly from some types of documents, instead of using an auto-generated default. See below for details.
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An Attachment Report is created by uploading an external document. Some documents can have embedded thumbnails included, and LabKey Server can in some cases extract those thumbnails to associate with the attachment report.
The external application, such as Word, Excel, or PowerPoint, must have the "Save Thumbnail" option set to save the thumbnail of the first page as an extractable jpeg image. When the Open Office XML format file (.docx, .pptx, .xlsx) for an attachment report contains such an image, LabKey Server will extract it from the uploaded file and use it as the thumbnail.
Images in older binary formats (.doc, .ppt, .xls) and other image formats, such as EMF or WMF, will not be extracted; instead the attachment report will use the default auto-generated thumbnail image.
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