there are four types of transform settings that you can work with:
· position use these controls to position your clip on the x (horizontal), y (vertical), and z (depth) axes. values of (0,0,0) pixels align the center of your clip with the center of the screen, and positions are measured from this point.
you can enter positive or negative pixel values to move your clip right or left (x), up or down (y), and forward or backward (z).
· size use these controls to make your clip smaller or larger. full-screen size is represented as 100%. you can shrink your clip to 0% or enlarge it to 1000%. note, however, that by enlarging your clip, the resolution may become blurry. you can adjust the size controls individually, or if you select fixed aspect ratio, you only need to adjust one axis, and the others automatically take the same value. adjusting the percentage on the x and y axes changes your clip's width and height, respectively. you'll only notice adjustments to the z axis when you have depth in your effect, such as in the advanced dve effects.
· offset and rotation use the offset controls to set the pivot point, or center of rotation, of your clip. when rotation settings are applied, your clip spins around this point. you can use positive or negative pixel values to offset your clip on the x (horizontal), y (vertical), and z (depth) axes. each rotation of 360∑ produces one spin on the selected axis. you can have positive or negative rotation from -3600∑ to 3600∑, which is equal to -10 to 10 spins, depending on the direction you want your clip to rotate.
in the illustrations below, notice how different offset values can affect the rotation of the cube.
in figure 1, the offset values are (0,0,0), so the center of rotation for the cube is where the x, y, and z axes meet. in figure 2, the offset value for the x axis is set to 100, thus moving the cube and the pivot point to the right, so when the cube is rotated, it has a wider arc when spinning around the axes.