Photoshop can easily be used to change the color and mood of a photo.

Professional photographers can use Photoshop to retouch things such as skin blemishes and lighting.

Using layers and combining selections of various images, Photoshop is ideal for creating surreal landscapes and other digital art.

Artwork created in Adobe Photoshop is referred to as Raster art. Raster art is created by a series of pixels. Much like a high-definition television, the more pixels contained in a square inch, the higher the image quality.

Illustrator art is created by a series of lines and curves and can generally be scaled to any size, large or small, and is called Vector art.

Since the quality of Photoshop art is based on a specific number of pixels, document and resolution size is very important.

When creating a new document in Photoshop make sure it is:

300 pixels/inch

Dots Per Inch or Pixels Per Inch matter when choosing images on the web or creating new documents. The best way to tell if an image from the web is good enough to work with, is to drag it into a document that is already 300dpi. If the image still looks good, it should print clearly.

If you really want to make sure, use the Zoom tool to zoom in a few times. If you still cannot see the pixels of the image, it's okay to use.