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:
The following settings can also be adjusted from the context toolbar, but always in relation to selection bounds:
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.