The element can be moved relative to its fixed position. The top left and bottom right edges of the element are moved in x- or y-direction by a value (pixels) defined by an integer variable. In contrast to an absolute movement, a relative position is defined, i.e. the distance to the original position. This function can be used to change the shape of the element. Positive values move the horizontal edges downwards and/or the vertical edges to the right.
in TC3 all settings can be changed, as they are all variables of the elements, in TC2 it was a little difficult, however there is existing a nice library to do this.
also have a look at www.oscat.de for more functions.