In inPhoto ID PS, the preview pane may be open in two windows, in the main window and in a separate window.
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Hereinafter, the preview area will also be referred to as "preview".
So you can place the preview on two displays. It's convenient to see a preliminary image on two displays simultaneously when, for example, one of them is used by the photographer and the second one is turned to the person being photographed. Thanks to the fact that the target person can see himself in the preview, he may take more natural appearance and feel himself calmer because of knowing what image will result.
You can open the preview in a separate window using the Preview Window command placed in the main menu View. You can also close the preview window with the Preview Window command or the button 
in the upper right corner of the window.
Image previewing in a separate window is performed the same way as in the application main window.
The size of the preview separate window are not constant and you can therefore adjust the window according to your needs and display's dimensions.