Maximum Number Of Labels property is misplaced
Maximum Number Of Labels property is visible in any representation proxy settings:
The documentation is not really clear either:
The maximum number of point labels shown. If the dataset contains more points that this number, a random subset of this size is chosen and labeled
It actually controls the selection display label which is controlled from the FindData dockwidget.
It should either be moved there or completelly removed as it can actually be controlled from Settings->General