When you open the Image Size Dialog Box again, you see that the image will print at 7.6x5.1 inches at 300ppi. Be sure that you have the Constrain Proportions box at the bottom checked, this will make any changes proportional to both the height and width. These are somewhat awkward dimensions, so I try to make the following changes as soon as I download an image: Change the resolution to 300 (this is a standard resolution for printing and publishing photographic images) and in the pulldown menus next to Width and Height choose percent. For some unknown reason, when you download an image from a digital camera it always sets the ppi to 72 at a large print size. In this case, the print would be at 72 ppi (pixels per inch) at 32x21.3 inches. The lower box, Document Size, tells you what size the image would print if it were sent to a printer and what the resolution of that print would be. In this case, the image is 10.1 Megabytes (Mb) in size. The upper part of the box, Pixel Dimensions, tells you exactly how large the image is in pixels and how much space the image requires on the hard drive if it is uncompressed. Open an image in Photoshop and then open the Image Size Dialog Box under Image in the menu bar.
#What is the pixel size of a powerpoint slide how to#
To optimize the file sizes of your images, it's important to understand how to use the Image Size function of Photoshop. Inserting digital images and movies into PowerPoint is easy, but care must be taken to optimize the file size of the images to keep the program from hanging up or crashing during the presentation. PowerPoint has become the most used slide show program fror teaching and training and most everyone in science will have to use it at some point. Sizing Digital Images For Powerpoint One of the most prevalent uses of digital imagery is in PowerPoint Presentations.
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