Log into your account and place your cursor on the bottom of your photo. You will see ‘change photo’ appear and when you click that, you’ll see the option to ‘choose from photos’ or ‘upload photos’. “Choose” lets you use a photo you have already uploaded to your Pinboard, and “upload” lets you browse for a photo on your computer. Select the option that you prefer, find your photo, and select it to use as your new photo on your profile
If you have any questions about this feature, please feel free to contact Support here.