What are some ways the king's portrait was used? ?

King's portrait plays a significant role in his reign. Portraits helped in expressing his emotions (serious), to display his importance and power to his people in the kingdom. King's portraits assisted in showing off his wealth by indicating his surrounding and clothing in the painting. Portraits also served in showing his commanding presence and superiority.

The king's portrait was used in several ways in which different aspects were kept in mind.

For example the the facial expression in his portrait, the emotion in his eyes, his face cut and in short the essence of the entire portrait was in fact a master piece. A master piece always has fine detailing that makes it close to reality and  makes it a fine portrait that is worth keeping.

I hope the answer is helpful.

Thanks