Use the checkboxes to choose 1,2, or even 3 transformations. Transformation 1 and 2 are limited to rigid transformations (translate, rotate, reflect). The dilate box allows to change the size proportionally. You can adjust the final destination for a translate, the center for a rotate, the mirror line for reflect, and the origin for dilate. The decorate box can be chosen to show congruent corresponding sides.
1) Is there more than one combination of transformations that gives the same final product. 2) Why isn't the dilated shape marked congruent like the others? 3) Can you import an image and pre-image (edit->insert image from file) and then use transformations to describe the mapping from the pre-image to the image?