If NXPowerLite is configured to flatten embedded objects, it will remove the 'native' representation, which can significantly reduce the size of files, but flattened objects can no longer be edited in the application in which they were created.Compress PPT document using the application that we have developed for you. an Excel® chart embedded in a PowerPoint® presentation) are saved in Microsoft® Office documents with two representations - a 'picture' representation and a 'native' representation. Flattens embedded objectsĮmbedded objects (e.g. If NXPowerLite is configured to discard cropped image data, the non-visible parts of images will be removed, so will not be recoverable after optimization. Cropping causes only part of the image to be displayed, although the entire image is preserved when the file is saved, so it is possible to undo or change the amount of cropping later. This option is available by right-clicking on an image and selecting 'Size and Position.' in Office 2007 or later, or 'Format Picture.' in earlier versions of Office. Removes cropped areas of inserted imagesĪfter inserting an image into a PowerPoint slide, it is possible to request that the image be 'cropped'. NXPowerLite removes any data which is not required to display the image. For example, JPEG files created by a digital camera may contain EXIF information which indicates the type of camera used, where the photograph was shot and date that it was taken. PNG or JPEG) allow additional metadata to be embedded in the image file. Previous edits are not available through PowerPoint’s® user interface anyway, but forensic tools may be able to extract some historical information from a ‘fast saved’ file. NXPowerLite removes this 'fast save' information, preserving only the most recent edit. This has the effect that in some cases, deleted or edited objects will not be removed from the PowerPoint® file when changes are saved. PowerPoint® 2003 and earlier have the option to enable 'Fast saves'. Wherever possible, NXPowerLite will convert such images to PNG or JPEG format depending on which is smaller. PPTX files often contain images in WMF (‘Windows Metafile’) and EMF (‘Enhanced Metafile’) formats, which are suitable for vector graphics but are highly inefficient for representing bitmapped images (e.g. The default setting (7) will result in a barely noticeable loss of quality, even at 100% zoom. NXPowerLite can also apply additional compression to images that are already in the JPEG format. NXPowerLite can convert certain types of image to JPEG format, which offers high compression levels but can affect image quality. For example, if NXPowerLite is configured to optimize PowerPoint® files for viewing at 1600x1200 pixels (the default setting), any images which fill an entire slide and are larger than 1600x1200 pixels will be scaled down to 1600x1200 pixels (sufficient for nearly all viewing and printing purposes). NXPowerLite can scale down such images by a configurable amount. For example, a photograph taken by a digital camera might contain ten million or more pixels, but most of this detail will not be visible unless ‘zoom’ controls are used. Images are often inserted into Microsoft® PowerPoint presentations at much larger sizes than necessary. NXPowerLite can selectively optimize each of these elements within the files to create leaner, smaller presentations. Microsoft PowerPoint files contain an abundance of content that can be optimized from oversized images and old fast save information to hidden data in embedded objects.
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