Report Editor - ToolBar - Alignment
This group is present on all tabs of the report toolbar. It allows you to switch between preview, scripts and editor modes.
Note, that you can use keyboard shortcuts ⌘+1, ⌘+2 and ⌘+3 to switch between Editor/Scripts/Preview modes respectively.
Here you can see four buttons to move selected control(s) by mouse clicks.
Here you can see 3 + 3 buttons that are enabled only when few objects are selected. Using these buttons you can align that objects horizontally or vertically.
This group contains buttons that allow you easy align the vertical or horizontal size of an object to the size of its parent object.