You can also use the cursor keys to move around the grid: if possible
the cursor will always move orthogonally, otherwise it will move
towards the nearest island to the indicated direction. Pressing the
-return key followed by a cursor key will lay an island in that direction
+return key followed by a cursor key will lay a bridge in that direction
(if available); pressing the space bar followed by a cursor key will
lay a \q{non-bridge} marker.
You can also use the cursor keys to move around the grid squares and
lines. Pressing the return key when over a grid line will draw or
clear its edge, as above. Pressing the return key when over a dot will
-pick up an arrow, to be dropped the nest time the return key is
+pick up an arrow, to be dropped the next time the return key is
pressed; this can also be used to move existing arrows around, removing
them by dropping them on a dot or another arrow.