If you plan to print your publication, your image will need to be at a resolution of 300 dpi at the required size. To check the resolution of an image, right click and choose Properties (PC) or Get Info (Mac). If the image is larger than required, it may be sized down. For quality purposes, avoid sizing up images.
For the web, resolution requirements are much smaller: 72 dpi to 96 dpi at the required size.
In general, the color mode of an image should be in CMYK if you are printing to a laser printer or sending out to a press.
RGB is the required color mode for images on the web (jpgs and gifs are almost always RGB).
If you need to change the color mode of an image, you can do so in Photoshop by choosing Image>Mode and checking the color mode you need.
If you have questions about the resolution, size, or color mode of your image, please contact the Communications group.