Other manufacturers have chosen to map the Fn key not to the left of the space bar but instead to the right, so that the space bar can be better centered with the rest positions (alphabetic keys F and J on Latin layouts), without sacrificing the width of the left Control and left Alt key (already reduced by the insertion of the left Win key between them), while keeping AltGr on the right large enough for more frequent use on international layouts; in that case, the Fn key just replaces the second Win key (which is optional and in fact not needed) of extended PC keyboards. Other manufacturers have placed the Fn key at end of row B, immediately to the right of the second Shift key which is larger than necessary for typing text, in order to map the second Win key next to the right of AltGr, or to preserve the conventional placement of Japanese input mode keys.