I.R.I.S. Readiris 14 for Windows User Guide - Manual (Page 86)

Section 8: Editing the Recognition Zones
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 The two zones are merged into one.
Note that only zones of the same zone type can be
connected.
Deleting zones
In case you want to exclude zones from the recognition:
 Click Select zone in the Editing group.
 Then press and hold the shift key and select the zones you
want to delete.
 Right-click one of the selected zones, point to Zone and click
Delete.