This is a collection of small one-player puzzle games.
-\copyright This manual is copyright 2004 Simon Tatham. All rights
+\copyright This manual is copyright 2004-5 Simon Tatham. All rights
reserved. You may distribute this documentation under the MIT licence.
See \k{licence} for the licence text in full.
\dt \e{Rotate tile clockwise}: right mouse button, \q{D} key
+\dt \e{Rotate tile by 180 degrees}: \q{F} key
+
\dt \e{Lock (or unlock) tile}: middle mouse button, shift-click, \q{S} key
\dd You can lock a tile once you're sure of its orientation. You can