You can use 'left' and 'right' cursors to move between images and 'escape' to close the viewer; or you can use the mouse to click the left/right side of the image to change images and click 'close' or click in the faded grey area to close the viewer.

Please note that until all the images have 'pre-loaded' clicking on the thumbnails will open the image in a new window and not in the Gallery Viewer

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