I.R.I.S. Readiris 14 for Windows User Guide - Manual (Page 28)

Section 2: Getting Started
32

To restore a panel to its initial position, double-click its
title bar again.
Minimizing the Ribbon
The ribbon can be minimized to save space in the Readiris
interface.

To minimize the ribbon, right-click inside the ribbon,
then click Minimize.