The alignment functions are made available when selecting two or more objects in sequence on screen by clicking them while keeping the CTRL key pressed down. The first selected object will become  the reference object, which all the alignment or size commands will refer to.  Once a group of objects has been selected, the reference object can be changed by clicking  it.

The Alignment functions also allow selected objects to be aligned according to their barycentres. This can be done by pressing the "Shift" key and activating the command from the  "Aligning Bar" or "Layout Menu". The command will always consider one central barycentre for the selected objects.

Left

This command aligns the selected objects on the screen's left hand side.

 Right

This command aligns the selected objects on the screen's right hand side.

Up

This command aligns the selected objects at the top of the screen.

Down

This command aligns the selected objects at the bottom of the screen.

Centre Vert.

This command aligns the selected objects in the centre of the screen vertically.

Centre Horiz.

This command aligns the selected objects in the center of the screen horizontally.

The object with the lowest Tab number will be used as the reference object for aligning the other objects with.  The reference object's resize handles will be highlighted with a different color compared to those of the other objects which will remain transparent.  Once the group of objects has been selected you can change the reference object by clicking the one you desire.

Width

This command resizes the selected objects with the same width on screen.

Height

This command resizes the selected objects with the same height on screen.

Both

This command resizes the select objects with the same width and height on screen.

The object with the lowest Tab number will be used as the reference object to align the other objects with.  The reference object's size handles will be highlighted in a different color compared to those of the other objects.  Once the group of objects has been selected you can change the reference object by clicking the one you desire.

 Vertical

This command centers the selected objects vertically within the screen area.  When more than one object has been selected, the area occupied by the selected objects will be centered.

Horizontal

This command centers the selected objects horizontally within the screen area. When more than one object has been selected, the area occupied by the selected objects will be centered.