Lets you align the local axis of an object or sub-object selection with the current viewport.
You can use Align to View with any selection that can be transformed.
From this flyout, you can also choose Align, Align Normals, Place Highlight, or Align to Camera.
The Align to View dialog contains the following options:
Align X, Align Y, Align Z: Specifies which local axis of the selected object will be aligned with the current viewport’s Z axis.
Flip: Switches the direction of the alignment.
The alignment takes place while the dialog is displayed.