The Align Camera function is used to view the 3D model in SolidWorks Composer from different angles. However, some of the angles are predefined. So what if you decide to create your own custom Viewport?
Go to Files > Properties > Document Properties
Here, you can create your own custom camera view.
The blank space on the left is for you to define your new camera view name
Theta is the viewing angle relative to the front view about the vertical axis (in degrees)
Phi is the viewing angle in degrees with relation to the horizontal axis.
Note that there is NO WAY to rotate the model in the Viewport then determine the Theta and Phi values.