What is highlighted as a notable feature of Bihzad's work?

Lengthening of double chins

Answer- Lengthening of double chins

Babur had a keen eye for portraiture and this is also recorded in his memoirs. Among the artists, who find mention in Babur’s memoirs is Bihzad. Bihzad’s work was dainty but he did not draw the faces well; he used to greatly lengthen the double chin (ghab-ghab); and drew bearded faces admirably. Bihzad was a master artist from the Persian school of painting, Herat (now in present day Afghanistan), and was known for his sophisticated compositions and colour tints. Also, Shah Muzaffar finds a mention as a painter, who Babur thought excelled in the representation of hairstyle. Although Babur spent little time on the Indian soil and passed away soon after his arrival, his successors made the country their own and became a part of the Indian lineage.