When you stress upon subject more than form during visualization process, you are said to be illustrating. The purpose of illustration is to provide a graphical representation to textual information, like poem or story.
With illustration, you can give convey subtle thematic tone in a narrative, expand linguistics of a narrative to the emotional level, illustrate procedures, etc-thus, give form and carcass to text.
Most common computer software used for this transformational process is Adobe Illustrator, Photoshop, and CorelDraw.
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