I am trying to change my header. Here are the steps that I used to complete this process. I uploaded my image from my library to media. I chose the image from media, it then led me to a page to select and crop. I used the pixels 1170 x 40 as my format that I created beforehand. I typed in the caption and description I clicked on add new, a darker image covered my old image to complete the process, however, the new image for the header did not appear. I then went back to repeat my steps, this time hiding the old image. And clicked on add new image, this did not work either. Please help. Thank you, Izetta Gourdine.
Which theme are you using, Izetta? This process can vary widely, depending on the active theme for your site.