Brother EM-430 - Manual (Page 39)

Advanced Typing
Hold down the [CODE] key and press the [LINE OUT] key. The typewriter will erase
the character at the current carrier position and everything to the left of it.
The carrier will stop at the beginning of the line and await your corrected input.
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Note:
To stop the line out function, simply press the [CORRECT] key.
Insertions and Deletions
Instead of simply replacing incorrect characters or words, you may wish to insert extra
characters, or delete them, or even replace words with different ones. In this case you may
find that there is too much or too little space available for the correction to be inserted
without running into the next word or leaving a big gap. Using the [BS I] key allows you
to balance the spacing of your corrections so that it is not apparent that insertions or
deletions have been made.
Insertions
If you try to insert an extra character into a word, you will be left with no space between
it and the next word. You can even this up by moving the whole word half a space to the
left so that there is a half space on either side of the word.
First use the [SPACEBAR] or [BKSP] key to move to the last character of the word
you wish to correct.
This electronic typewriter is real typng happiness!
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Press the [WORD OUT] key to delete the whole word. The carrier will remain at the
position of the last character removed.