I.R.I.S. Readiris Pro 12 for Windows User Guide - Manual (Page 75)

Readiris TM Pro 12 – User Guide
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 The option Convert figures into numbers encodes recognized
figures as numbers.
As a result, you can execute arithmetical operations on those cells.
The text cells (in any table) remain text.
Note that only figures inside tables are encoded as numbers.
Excel exclusively executes mathematical operations on data that is
encoded as numbers.
 The option Create one worksheet per page sees to it that one
worksheet is created per scanned page.
If a page contains tables and text, all will be placed on the same
worksheet.
 The option Create one worksheet per table places each table in
a separate worksheet and includes the recognized text (outside
the tables) in another worksheet.
If the recognized document contains several pages, you'll see that
structure repeated per page.
General options
Click the Options tab to select the general options: