This tool is accessible via Main Menu > Transform > Align Objects .
Alignment functions with two or more objects selected in the Work Area or in the Object Inspector. Alignment is performed with respect to the object that was selected first.
Three horizontal controls align selected objects to the left side, center, and right side of the entire selection.
Three vertical controls align selected objects to the top, center, and bottom of the entire selection.
An instant preview of the resulting alignment appears in the Layout panel and also in the Work Area.
Three objects are selected in the Work Area. The first selected object has number 1.
Preview of alignment to the upper edge. Alignment is performed with respect to the object 1.
Objects from the example above are aligned to the upper edge of the first selected object.