Thanks , it helps , but still think it's complicated a little bit, in revit that is solved more easily by having 2 interactive dimentions at left and right side of element .
Make sure you align your window to the right side and hold your mouse on the edge of the other window (without pressing any mouse button).
Then press X for horizontal and Y for vertical distance, followed by the offset distance with a + or - (500+) and press enter to place the window.