I.R.I.S. Readiris 14 for Windows User Guide - Manual (Page 85)

Readiris TM 14 – User Guide
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 Then click inside the zone you want to move, hold the left
mouse button, and drag the frame to the position of your
choice.
Connecting zones
Suppose you have two text zones that belong together, and you
want to turn them into one single text zone. In that case:
 Select Text in the Editing group.
 Then draw a text zone between the two zones to connect
them.