The Variant Selector helps to do side-by-side comparisons of several variants of filtration applied to a selected image area. When you consecutively adjust the filter settings you get several variants of filtration. To save all these variants and then select the best one use the Variant Selector.
(the Variant Selector button) on the toolbar or by selecting the Tools | Variant Selector menu item. The window will pop up to enable adding filtration variants.
(the Add new variant button). If you change any filter setting then one more filtration variant is prepared and added to the Variant Selector by Neat Image.
and
(the Move variant up / down buttons) or drag and drop variants in the list to sort them according to the visual
quality (for example, move the best variants to the top of the list to group them for easier comparison).
(the Delete variant button) or press the Del key to remove the selected variant(s) from the list.
(the Select variant button) or press Enter or double-click a variant to select it as the best one and send it to the filter (the filter settings will be automatically adjusted to produce this variant of filtration).