Final answer:
Illustration programs are used by graphic designers to create and edit vector images, offering features to manipulate elements like color, scale, and balance effectively. These programs differ from photo editors and are suitable for producing scalable graphics without losing quality.
Step-by-step explanation:
To create and edit vector images, illustration programs such as Adobe Illustrator and CorelDRAW are commonly used by graphic designers. Unlike photo editors, which are typically used for editing pixel-based images such as photographs, illustration programs work with vector graphics, which are made up of paths defined by mathematical equations. These programs allow the designer to create complex designs with clean line art, which can be scaled indefinitely without losing quality. They support the elements and principles of design, allowing designers to make preliminary drawings, arrange elements in a layout, and skilfully manipulate elements with attention to color, scale, balance, unity, and variety.
When creating a digital portfolio, one might use presentation graphics software or image galleries to organize and display works, but these tools don't typically have the capabilities to edit vector graphics themselves. Hence, to specifically create and edit vector graphics, illustration programs are the go-to choice.