(loading) speed of Storyline 360 slides

One other thing to consider is the file size of your images. Larger file sizes for images = longer loading time. A good habit to get into is to crop and resize your images before loading them so that they are not longer/wider than the resolution for your project. If you have a 8 Mb high quality image, taking it down to a more reasonable resolution before loading it, or load it, figure out how big it should really be and modify it in a tool like Photoshop/SnagIt editor, save as a .jpg, and replace image to have a smaller file size within your project with resolution that is still effective for your project. Takes a bit longer but the speed improvement is worth it, especially if you project is image heavy.