Objects can be aligned on the page accurately using the Alignment commands.
Settings can be adjusted from the Alignment pop-up panel on the Toolbar:
Align to—the pop-up menu sets the alignment criteria for the operation. For example, you can align in relation to Selection Bounds, page Spread, page Margin or the first (or last) object selected during a multi-object selection (by marquee drag over or selection with ). If margins are not set, alignment is to the page edge instead.
To align objects:
Select multiple objects.
Do one of the following:
On the Toolbar, click Alignment, set the Align To option, then an Align Horizontally or Align Vertically option from the pop-up panel. Click Done.
From the Layer menu's Alignment sub-menu, select an alignment option.
The following settings can also be adjusted from the context toolbar, but always in relation to selection bounds:
Align Horizontal—aligns the selected objects using the Left edges, Center points, or Right edges of the objects.
Align Vertical—aligns the selected objects using the Top edges, Center points (Middle), or Bottom edges of the objects.
To toggle Edit All Layers:
On the Layers panel, click Edit All Layers.
When enabled, alignment handles appear as you drag objects, allowing you to place them precisely by lining them up in accordance with other objects in your document. Alignment handles are especially useful for aligning the edges or centers of multiple selected objects to another page object or guide.
To add alignment handles to a selection:
With an object (or objects) selected, click on the Move Tool.
From the context toolbar, select Show Alignment Handles. When selected, alignment handles are displayed at the center and edges of the selected object. Hovering over these handles displays a floating guideline across the page.
Drag the selected object via any alignment handle (center or edge) to align it to a page element on the spread. This position can be snapped for accuracy.