You can change the direction of the Y-axis, and set the origin.
By default, the Y-axis points down, and the origin is at the left top. With the Y-axis up, the origin is at the left bottom.
To change the Y-axis direction #
Open the Settings tab.
Select the Y-axis direction.
To change the position of the origin #
Open the Settings tab.
Set the coordinates of the origin relative to the default origin. This depends on the direction of the Y-axis.