How to add pictures to Quizlla quiz....five points best answer?

[Qui Qui]

Every time I try to add a picture to the results a white box pops up so i click on brose computer find my picture then what? How do you add it, I try and scroll down some but I cant see the words at the bottom... please if you know what to do please answer because I don't want to start over on my quiz every time. Five points best answer