What image formats are suitable for printing?
We recommend JPEG images because this format doesn’t allow transparency, which can be a problem in the printing process. Be sure to save your JPEG images with minimal compression/maximum quality. If you’re a Mac user, you can save the images as PDF or EPS. If you use PowerPoint for Windows, you can save the images as EMF.
What image resolution should I use?
The image resolution you should use depends on the type of image that you are using. For colour or grayscale images, a resolution of 300 dpi is recommended, while black-and-white bitmap images need at least 600 dpi. Calculate the resolution of your images – see image.
What should I consider when using copyrighted images?
You can read important information when using copyrighted images in this link http://www.ub.uu.se/use-the-library/digitization/copyright/