I.R.I.S. Readiris Corporate 12 for Mac User Guide - Manual (Page 61)

Readiris TM Corporate 12 – User Guide
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If the results are incorrect:
o
Type in the correct characters and click the Learn button.
Note: if you are dealing with documents that contain special
characters make sure you click the command Special
Characters on the Edit menu. Double-click the characters you
want to insert.
or
o
Click Don't learn to save the result as unsure.
Use this command for damaged characters which could be confused
with other characters if learned. E.g. the number 1 and the letter I, which
have an identical form in many fonts.
o
Click Delete to delete characters from the output.
Use this button to prevent document noise from appearing in the output
file.
o
Click Undo to correct mistakes.
Readiris keeps track of the last 32 operations.
o
Click Abort to abort interactive learning.