Here are the main ways in which the default xstroke alphabet differs
from the alphabet of xscribble.

No modes.
---------

Capital letters are made using the lowercase stroke and backing over
the final line segement in the stroke.

Since numbers do not enjoy the benefit of a separate mode many of
their shapes look similar to letters. Because of this, most numbers
are made by drawing the number in reverse, (ie. 1 is drawn by stroking
up, 2 is a Z-stroke in reverse, 5 is an S-stroke in reverse,
etc.). The numbers 6,8, and 9 are stroked in the normal direction.

The punctuation alphabet is almost completely custom, see the diagrams
in doc/alphabet.ps.

Changes in letters
------------------

Aside from the difference in capital letters, xstroke has the
following differences from xscribble in the letters:

The 'k' stroke is made by stroking horizontally to the left, then down
and to the right at a 45 degree angle, (32159).

The 'q' stroke is simply a counter-clockwise circle starting at the
bottom, (8963214789).

The 'r' stroke is shaped like a lowercase r, (1474123).

The 'u' stroke does not end with a down-stroke, (that would make a
capital U). So u=14863 while U=1486369.

The 'x' stroke is like a backwards 'k' stroke -- horizontally to
right, then down-and-left at a 45 degree angle, (12357).

The 'y' stroke has no loop -- it looks more like the number 4, (1456369).

Extra Letter Strokes
--------------------

xstroke allows some letters to be input with shorter, faster strokes
than xscribble:

initial bar on 'b' stroke is optional, (or it can go up only rather
than down-and-up).

initial bar on 'd' stroke is optional, (or it can go up only rather
than down-and-up).

initial bar on 'p' stroke is optional, (or it can go up only rather
than down-and-up). Note that if the bar is left off completely, then
the stroke must be drawn in reverse, (from lower-left curving around
to upper-left), to distinguish 'p' from 'd'.

xstroke also supports some letters with multiple strokes. The
following strokes are in addition to the "standard" stroke which are
shaped like capital letters:

lowercase a, (324896369)
lowercase b, (147456987)
lowercase d, (369654789)
lowercase e, (4562489)
lowercase g  with tail to left, (32145636987)
lowercase n, (1474269)
lowercase p, (1474123654)

And if none of that made any sense whatsoever, please just see the
postscript diagrams in doc/alphabet.ps.
