Some projectors have a higher resolution than a monitor. Choosing this option will enable compression for Screen resolution to display the presentation using a projector or distributing via the Internet.Select this option if you are printing the presentation on paper it keeps the photos at a resolution where they will look crisp on a printout.You can decide the quality of the inserted picture choosing between any of the four options available within Picture Quality drop-down list:.In this dialog box, click on the Picture Quality selection box to open the Picture Quality drop-down list as shown in Figure 5.You should select a picture in your presentation before opening the Reduce File Size dialog box to make these options available. Warning: Do note that if you have chosen the File | Reduce File Size menu option without selecting a picture, you will find that both the options within the Apply to section of Reduce File Size dialog box are greyed out. This brings up Format Picture contextual tab on the Ribbon as shown in Figure 1 (highlighted in red). Open the presentation, navigate to the slide that contains a picture and select it.To reduce the resolution and compress images in PowerPoint 2011 for Mac, follow these steps: However, if you are distributing the presentation in other forms, a higher resolution might be appropriate. A computer screen shows 96 pixels per inch, so you do not need higher resolution than that if you are only showing your presentation on-screen.
This roughly translates to dots per inch (dpi) on a printout. Picture resolution is measured in PowerPoint in pixels per inch, or ppi. It does so by reducing the picture resolution to the amount needed for the type of output you specify (Print, Screen, or E-mail). The Compress feature for pictures offers an image compression utility that reduces the size of all inserted pictures in the presentation in a single step.
By default, PowerPoint simply copies your inserted pictures into your presentation leaving the size and format largely unchanged. Although using pictures enhances the look of your presentation, it can also phenomenally increase the size of your presentation file.
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