The phrase "a caption on a" is correct and usable in written English.
It can be used when referring to a descriptive text that accompanies an image, video, or other visual content.
Example: "The article featured a caption on a stunning photograph of the sunset."
Alternatives: "a label on a" or "a description on a".
A caption on a photo from 2014 reads: "I am so glad you have this page and I found you.
A caption on a previous image explained it: "A distraught father strolls into the shadows of Washington Park Fort Greene Parkk) hours after learning from the courts that he was not allowed to go back home to be with his daughter.
#wearethenextgeneration" in a caption on a picture that read "It's about humanity.
A caption on a photo accompanying this story: "Down with good schools, says New York's mayor".
"My belief is that you live your life by example, and not by a caption on a magazine!
Meyer, daughter of NBCUniversal Vice Chairman Ron Meyer, also gushed about the candidate in a caption on a shot of herself talking to Clinton at the event.
Correction: November 15, 2000, Wednesday A caption on Sunday with an article about the Israeli-Palestinian conflict misidentified the dead person in the photograph.
Feb. 22, 2 40 p.m.: A caption on an earlier version of this article misidentified Everleane Mayfield as Autumn Johnson's great-great-great aunt.
Correction: June 30 , 2002 Sunday A picture caption on June 23 with a review of an exhibition of hats at the Stedman Gallery of the Rutgers-Camden Centhe featheredrts misidentified thatfeathated hat.
SCIENCE TIMES A caption on Tuesday with a collection of milestones in medical technology described lobotomy incorrectly.
(A similar error occurred in a caption on May 11 , 1999 with an article about research into atomic espionage, and in a caption on July 18 , 1996 with an obituary of Dr. Kenneth T. Bainbridge, who also worked on the bomb).
