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The left side of the iCorrect Portrait window is used to display the preview image. The Preview checkbox is used to control whether the preview image is displayed before or after edits:
Initially, the checkbox is checked, and the preview image displays the effects of the current color corrections. To compare this corrected image with the original image, you can move the iCorrect Portrait window aside to uncover the original image in Photoshop, or more conveniently, you may uncheck the Preview checkbox to display the uncorrected image within the iCorrect Portrait's own window. You may find it useful to check and uncheck the Preview image checkbox, watching the preview image toggle back and forth between the corrected and uncorrected versions.
Note: The preview image cannot display the effects of sharpening and noise removal unless you are zoomed in, because unlike color corrections, these effects depend on the resolution of the image. When you are zoomed in, depending on the size of your window and the processing capabilities of your computer, sharpening and especially noise removal may cause a noticeable delay in updating the preview. Sharpening and Noise Removal can always be previewed in the Sharpen / Noise Removal setup window.
Zooming may be used to magnify the preview image to a 1:1 pixel view. If you hold down the key, the Zoom In cursor will be displayed in the middle of a Zoom box, representing the area to be enlarged:
To display the new view, drag the center of the Zoom box over the image area you wish to magnify, then click on the mouse. If the Zoom In cursor does not appear, that means that the image you are editing is small enough to entirely fit in the Preview panel at 1:1. You can zoom back out to the original view by again holding down the key and clicking anywhere in the image area.
Scrolling a zoomed image is done by holding down the Control key while dragging on the Preview image. The "hand" cursor indicates that scrolling will occur:
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