Arabic calligraphy styles
The Farsi hand, also called Nastaliq, hangs rather than sits. Every word starts high and slides down from right to left before it settles, so the line comes out in waves. It is the script of Persian poetry, and Urdu is still printed in it.
Nastaliq grew in Persia in the fourteenth century, and its name is a compound of the two scripts behind it, Naskh and Ta'liq. Its formation is usually credited to Mir Ali Tabrizi, who joined the clarity of Naskh to the downward slide of Ta'liq. It reached its peak with Mir Emad Hassani in the seventeenth century, and his hand is still the standard other calligraphers are measured against. A faster and more tangled offshoot came out of it, Shikasteh. Carried with Persian books into India, Nastaliq became the script Urdu is printed in to this day.
Follow the word, not the letter. Every word begins high and descends until it ends below where it started. The curves are wide and flat, the joins between them are thin, and the contrast between thick and thin is strong. The line itself undulates, and words overlap vertically more than they do side by side.
It is the hand of Persian poetry collections and books, and the official script of printed Urdu in Pakistan and India. In Arabic it is used for titles that want a graceful descent.
Build a line that descends the way Nastaliq does: drop each word below the one before it by editing the letters on the baseline, and enlarge the wide letters so their curves stand out. Then set the line on a curve you draw yourself so it flows as it should, and export your work as a vector file.
Open the editor, write your phrase, and shape its letters yourself. The account is free and one word is enough to start.