To a graphic artist, the tools of the trade are the computer and its components, so selecting a computer mouse is key. Just as a watercolor artist may have different preferences as far as what paint brush he uses, so too may graphic designers have different preferences for which computer mouse they decide to use.

What type of mouse to use while doing graphic design work is partly a matter of taste, but most graphic designers use one of two types of computer mouse:
Graphic artists may also elect to switch back and forth between these two options depending on the type of design work they are doing.
A trackball mouse operates via a small ball placed inside a socket inside the mouse; sensors surrounding the ball track its motion as the mouse is moved and cause the cursor to move accordingly.
A trackball mouse, is the oldest type of mouse on the market. It's also, to this day, the most accurate.
There are a great many other types of computer mice on the market these days, but those who do any type of graphically-based computer work will likely tell you that the trackball is still the best tool for the type of work they're doing, which requires very detailed control and precision movements.
A trackball mouse is one of the most used methods used by graphic artists because:
The other alternative used by most graphic artists is a graphics tablet.
However, while the trackball mouse and the graphics tablet are the two most common options for a graphic artist, the device any given artist uses really comes down to a matter of comfort and preference.