Am I right in saying that the P.Filter should apply to the selected print only?

Because when I apply a Black and White P.Filter the whole batch goes B&W, just as with G.Filter

The print filter does get applied to all images in the queue.

If you want just some images in the queue to be B&W then you must apply the B&W filter to those images only and not use a Print Filter.

The print filter is designed to apply corrections to a particular print set-up, it's effect is not visible on screen, only to the print.

To apply the B&W filter to certain images, select their thumbnails or select them in the queue, right click and choose "Apply Pre-defined filter", browse to the B&W filter file and ok.

Terry.