With Lazarus 1.8.2, the position of this toolbutton is at the right end of the toolbar. With Lazarus 1.8.4, no effect is visible.
If you need to align some of the buttons to the right, I recommend to do so:
1. Put Panel with Align = alTop
2. Put on it two Panels with aligns alRight and alClient
3. Put on each Panel (from 2) a separate ToolBar
4. For all panels set AutoSize = True and BevelOuter = bvNone