How do I change gender of one person on my tree?

Question

My grandfather's brother Aaron Mendoza Cisneros is listed and female and he is not.

Answer 1

I changed the gender for you and also erased the Unsourced line.  For future reference, when you're in edit mode the gender line is the bottom one in the first section, just above the Reason for Change line. you can easily change gender and then save.