Draw the circle with the Circle Tool and set size and position from the script window. circle.x and circle.y are the axes X Y coordinates at the center. circle.dx and circle.dy are width and height in axes units. circle.width and circle.height are width and height in layer units. (Format> Layer> Size/Speed tab)
OK, I have finished with the circle. But if I only need a arc of the circle, for example: 1/4 from the circle. How can I delete the part which I do not need?