Key Notation
This user's guide uses a special notation to
show you how to type each character and command
with a factory-preset chord. As you face Twiddler2's
twelve-key layout, you will find four keys (labeled SP,
DEL, BS, and ENT) arranged in a column on the left.
This column is designated L. The four keys in the
middle column (E, F, G, H) are referred to as M. And
the four keys on the right (A, B, C, D) are designated
R.
Each unique chord is defined by a four-symbol
sequence indicating which key is pressed in each of the
four rows ordered from top to bottom. If no key needs
to be pressed in a particular row, a zero (0) in the
sequence will indicate that. Remember that the first
symbol in the chord notation refers to a key in the top
row pressed by your index finger, the second symbol to
a key in the second row assigned to your middle finger,
the third symbol to a key in the third row pressed by
your ring finger, and the fourth symbol to a key in the
bottom row reached by your little finger. (See the box,
Finger Key Notation
)
For example, to type a lowercase letter
a
, your
index finger must press and release the key at the right
end of the top row, while no other keys need to be
pressed in the next three rows. So the notation for
a
is
R000.
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Chords
The Twiddler2 does not register a keystroke until you
release a key or keys. For example, when you press
the
A
key on the Twiddler2 and hold it down, nothing
happens. But when you release the
A
key, a lowercase
letter
a
appears on the screen. When you press a
group of keys as a chord, its assigned character does
not appear on the screen (or its assigned command is
not issued) until you release at least one of the chord's
keys. Because characters are generated by the release
rather than the initial press of a key, you do not have to
worry about whether you have pressed all the keys in a
chord at exactly the same instant.
Repeating Keys
On a standard keyboard, when you hold down
a key it generates a repeating character. To repeat
characters in the same way on the Twiddler2, press and
release a key or chord and then quickly press and hold
down the same key or chord. When you do this the
desired character will repeat as long as the key or
chord is held down.
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