[AlexH]

pretty simple really
follow the steps

1) click add below the current gfxs
2) where it says image put the image name like ball.png
3) where it says sprite index change the number to 21 (increase the number by 1 for every new image)
4) click the add button in the middle of the box


note if you want to add a certain part of a picture for example just one bird use the bottom half of the table to define the start x and y etc