How do I rotate a picture in memories where someone else submitted the photo?
As far as I know, you cannot. You can rotate one you have uploaded, but the rotate options are not available when someone else uploaded. You can try contacting the person who uploaded.
Hola, lo que yo hice en mi árbol, fue descargar la fotografía haciendo un recorte en mi computadora, la gire y volví a compartirla.
La tuve que rotar en mi PC
Si lo hace, ambas fotos se seguirán mostrando y se habrá atribuido el mérito de algo que no es suyo.
Here is an article about rotating pictures in Memories https://www.familysearch.org/help/helpcenter/article/how-do-i-rotate-a-photo-or-document-in-memories
The first part of the article indicates:
You can rotate most of the photos or document images that you upload to Memories.
So if something needs to be rotated you would need to contact the contributor and ask them to re submit it after it had been rotated.
Hopefully that will help.
Thank you for contacting FamilySearch. It has been a pleasure helping you. Best wishes as you continue finding records for your family.