When you create a project in Family Tree Builder, you have the option to upload images to your project. In order to do so:
Open your project. Navigate to the Photos section:
Click on the ‘New’ and choose ‘New Photos’:
Select photos from your computer. When you’re done, click on ‘Next’:
You can choose to edit the details of the picture and then click on ‘Finish’.
Make sure to sync your project to see your newly added photos on your site and to share them with the rest of your family!