Thumbnails Tab

Size

Use the Height and Width boxes to set the height and width of the thumbnails.

Select the Lock aspect ratio option to lock the aspect ratio between height and width. This will prevent image distortion. When locking the aspect ratio the thumbnails will in most cases fit either the specified height or width.

Clear the Lock aspect ratio option to make thumbnails exactly fit the specified height and width. This might add some distortion, depending on how much the aspect ratio of the original images differs from the specified thumbnail aspect ratio.

Select Crop image to fit height and width to crop an image to fit exactly the specified thumbnail size without image distortion. This option might trim edges of the original image, depending on how much the aspect ratio of the original images differs from the specified thumbnail aspect ratio.

Border

Click the Options button to open the Thumbnail and Image Border Options window. You can specify several different borders styles (e.g. standard, 3D, button, etc.).

Advanced options

Click the Advanced button to set advanced images properties.