Window based Zooming

To zoom in on a window, place the mouse cursor to the left top place of the window. Hold down the Ctrl key, than press and hold down the left mouse button. Move the mouse cursor in the right bottom direction of your window. After releasing the Ctrl key and the left mouse button zooming in will take place.

To zoom out, use the previous function, but now move the mouse cursor in the left top direction. The non changing rectangle visible is the border of your design. The changing rectangle is the zoom out window. After releasing the Ctrl key and the left mouse button, zooming out will take place.

The window based zooming function can be used in every possible drawing/moving function.