The y property defines the y coordinate of the Widget.
If the positioning property is set to TOP_LEFT, TOP_CENTER or TOP_RIGHT, the y-coordinate is the distance of the Widget's top edge to the top border of the screen.
If the positioning property is set to CENTER_LEFT, CENTER_CENTER or CENTER_RIGHT, the y-coordinate is the distance of the Widget's vertical center to the screen's vertical center.
If the positioning property is set to BOTTOM_LEFT, BOTTOM_CENTER or BOTTOM_RIGHT, the y-coordinate is the distance of the Widget's bottom edge to the bottom border of the screen.
The x property can be given in absolute pixels or in percent. Hence the value could have these forms:
Click the "px" or "%" button to convert between pixels and percent (preserving the absolute value).