What software is used to change the outline of calligraphy?

Use cdr software.

Directly in CorelDRAW, the font should be outlined and rounded first, then right-click on the text to convert it into a curve, and right-click again to split the curve. However, after that, words are all composed of strokes. If a single word is to become a whole, all strokes of each word should be welded.

Calligraphy is an artistic expression of the unique beauty of words in China and neighboring countries and regions deeply influenced by China culture.