New computer, now I can't post new pictures on FB. Says my password is incorrect. I am already on. How can I set a new password?

[iMore Question]

tried to send a photo from my photos and the site says I need to enter my name and Facebook password. I am already on Facebook. Won't take my info. can I set a new password?

 

[Just_Me_D]

Why would you do that? Can you not upload the photo from within Facebook instead of from within the Photos app?