Displayed graphical items in Workstation edition could be pixel images (bitmap, jpeg, gif, ...) or vector shapes designed with Shape Designer software. Pixel images tend to lose quality when resized, need large space on memory and decrease display speed and finaly can't have thier color changed depending on changes in tag's value. On the other hand vector shapes retain the quality independent of the scale, need less memory and most importantly, they could show changes in tag's value by changing self color. As an example, showing a working Fan in red and a stopped Fan in green would help the User to understand and recognize the changes more easily and more rapidly.
You will get a large library of vector shapes in different fields during software installation, but if you need specific designs, you can use this software to design what you need.