Align specifies what you mean by the 'position' of the Object. For example, when you talk about the position of the Object, you may be referring to where the center of the Object is. The alignment position can be one of nine preset positions on the corners, edges and center of the object. The alignment position is also the center for rotation and scaling of the Object. You can see the coordinates of the alignment position in the 'Transform' Panel.
Modify | Align | Left
Align selected Objects to the left.
Modify | Align| Center (Horizontally)
Align selected Objects to the center horizontally.
Modify | Align | Right
Align selected Objects to the right.
Modify | Align | Anchor (Horizontally)
Align selected Objects horizontally by anchor point.
Modify | Align | Top
Align selected Objects to the top.
Modify | Align | Center (Vertically)
Align selected Objects to the center vertically.
Modify | Align | Bottom
Align selected Objects to the bottom.
Modify | Align | Anchor (Vertically)
Align selected Objects vertically by anchor point.
Modify | Align | Distribute | Left
Distribute selected Objects horizontally by left side.
Modify | Align | Distribute | Center (Horizontally)
Distribute selected Objects horizontally by center point.
Modify | Align | Distribute | Right
Distribute selected Objects horizontally by right side.
Modify | Align | Distribute | Anchor (Horizontally)
Distribute selected Objects horizontally by anchor point.
Modify | Align | Distribute | Top
Distribute selected Objects vertically by top side.
Modify | Align | Distribute | Center (Vertically)
Distribute selected Objects vertically by center point.
Modify | Align | Distribute | Bottom
Distribute selected Objects vertically by bottom side.
Modify | Align | Distribute | Anchor (Vertically)
Distribute selected Objects vertically by anchor point.
Modify | Align | Space Evenly | Horizontally
Space selected Objects evenly horizontally.
Modify | Align | Space Evenly | Vertically
Space selected Objects evenly vertically.
Modify | Align | Space Evenly | Both
Space selected Objects evenly both horizontally and vertically.
Modify | Align | Make Same | Width
Make selected Objects the same width.
Modify | Align | Make Same | Height
Make selected Objects the same height.
Modify | Align | Make Same | Both
Make selected Objects the same height and width.
Modify | Align | Make Same | By Scaling
Scale selected Objects when changing size.
Modify | Align | Make Same | By Resizing
Resize selected Objects when changing size.
Modify | Align | Relative To All Selected
Makes all the alignment options align relative to all the selected Objects.
Modify | Align | Relative To Last Selected
Makes all the alignment options align relative to all the last selected Object.
Modify | Align | Relative To Parent
Makes all the alignment options align relative to selected the Object's parent. This is useful for positioning/aligning Objects within a Sprite.
Modify | Align | Relative To Stage
Makes all the alignment options align relative to the stage.