Raster

(JPG, GIF, and PNG)

There are virtually thousands of imagery types available to you online, so with some patience, you should be able to find some great imagery for your Prezi. Most raster images will be photographs, which give more life to your Prezi. Zooming in and out of details is very effective when using raster images saved at a high resolution.

You can use Prezi's built-in Google search feature to quickly find raster images.

It's difficult to find lots of raster imagery in the same consistent style unless you pay for it from an online library.

Zooming in too close to raster imagery will cause pixilation in Prezi.

Big raster images can be slow to load when users first open a Prezi. Lots of raster images in Prezi will mean a larger file size for your presentation.

Vector

(SWF and PDF)

Vector images will always have good compression, so file size is extremely small.

You'll be able to zoom into a vector image without any loss of quality or pixilation.

Vector images are scalable, so enlarging them will not affect the quality of the image at all.

It is possible to take a raster image and vectorize it to get all of the benefits mentioned previously.

Quality vector images will not show up in the Prezi image search feature detailed.

Vector images have a cartoon-like feel to them, and this can sometimes be a distraction to anyone viewing your Prezi.