Similar to PowerPoint, Keynote comes with multiple image manipulation tools that make it mostly unnecessary to resort to expensive advanced image editing software packages, such as Adobe Photoshop (Adobe Systems, San Jose, CA). Individuals who are already comfortable editing their images with PowerPoint can find analogous Keynote features detailed in Table . Users may find the preparation of radiology teaching presentations easier with Keynote as opposed to PowerPoint due to its more elegant implementation of many advanced imaging-related features. Those with an extensive teaching file should note that presentations created in PowerPoint will usually open in Keynote, with only minor adjustments needed for advanced features such as animations or video clips. Microsoft does offer a version of PowerPoint for the Macintosh operating system, but Keynote presentations cannot be directly loaded in PowerPoint; an export feature is included to allow users convert Keynote files into PowerPoint files.
Comparison of Microsoft PowerPoint and Apple Keynote
Importing images into Keynote can be accomplished easily by the drag-and-drop method from Finder (equivalent to Windows Explorer). To import one image file, the user needs to locate the file in the Finder then simply drag it onto the slide in the Keynote window. Furthermore, to import multiple image files simultaneously, the user needs to first select multiple image files in the Finder. This can be done by clicking on the desired files while holding either the Shift or the Command keys. (Note: the Shift key selects a group of consecutive files when the user highlights a beginning and ending file in a list, while the Command key selects a group of files when the user highlights each one of them individually.) Once selected, the highlighted files can be imported by the drag-and-drop method. There are two ways to place images within the presentation. If the user desires the multiple image files to appear on the same slide, then he/she should drop the images onto the slide directly. If the user desires each image to be placed on an individual slide, then he/she should drop the images onto the slide navigator on the left of the Keynote window (shown in Fig. ). Additional manipulations such as resizing and cropping may be necessary (as demonstrated in Fig. ). When the multiple-slides functionality is used, the images are aligned in the same location on consecutive slides, effectively creating a scrollable image stack when navigating forward and backward through the slides. Image characteristics (i.e., brightness, contrast, sharpness, etc.) can also be adjusted similar to PowerPoint. To do so, the user can select the image, and then choose View → Show Adjust Image from the menu bar. This will bring up a floating panel with a list of multiple image characteristics adjustable by moving the horizontal scroll bars. The user can also just click “Enhance” for Keynote to automatically optimize these various parameters.
Fig. 1 Adding multiple images or video clips to a presentation. a) Use the Finder to select the files corresponding to the images or cine clips that you want to add. Most common image and video formats that will play on your computer are acceptable. You can (more ...)
Fig. 2 Editing image and video properties. a) In Keynote, static images can be cropped by using the “Mask” function, which can be selected on the toolbar. The mask, as well as the size of the image, can then be adjusted. b) To adjust the properties (more ...)