If you are done aligning, save your progress as a new scene and give it a meaningful name (such as _actor_aligned.fbx_). This is useful if your alignments were not good enough, so you can continue from this point instead of starting over again.
Click on the _Snap_ button. A Textbox will appear and ask whether you want to use translation and rotation for calculations (TR) or rotations only (R only). Choose either of them.