Layer content 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 used from the context toolbar, either in relation to selection bounds or to a key layer, designated by clicking on an layer to align to with the pressed (the key layer is identified with a strong blue outline):
When enabled, alignment handles appear as you drag content, allowing you to place it precisely by lining it up in accordance with other content in your document. Alignment handles are especially useful for aligning the edges or centers of multiple selections to other page content or guides.