Adapt the sizes of your images to those of the screen Use this option when the proportions of your images are not the same as those of the chosen format, and if you wish the final image to fill all the space. Attention, in this case some parts of the image will be cut off.
Use the
Zoom function so that each image has the right size on your PC screen. Zoom in with the left button of your mouse, and
Zoom out with the right one. You can also use the wheel of your mouse in conjunction with the Ctrl key of your keyboard.
Put two transition points on the eyes, only on one picture Move this points with your mouse on the other picture so that they are also on the eyes of the subject (you can choose other details than the eyes, and add more points if you wish to).