In this article, we will outline radiology-specific image presentation tasks, such as how to efficiently import multiple images into a Keynote presentation, embed scrollable video clips (a feature important to image review) [3], reduce overall file size, and permanently remove patient identifiers. For users that are not familiar with Keynote or whom are transitioning their teaching files from PowerPoint, we will also compare similar image-related tasks in PowerPoint and discuss the use of Keynote to load and view PowerPoint presentations.

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. 1). Additional manipulations such as resizing and cropping may be necessary (as demonstrated in Fig. 2a). 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.