Digital Light & Color

When editing a new scratch, each point insertion or radius change triggers a computation updating the output image. The computing delays can be cumbersome.

When the scratch is wide and / or affects a large area, it would be more convenient to let the user draw or modify the scratch outline in many steps without recomputation.

When the user closes a scratch outline, this would trigger a computation. Possibly a preview button (running person shape) would also trigger redrawing.

You can turn off Auto-Preview to disable recalculation of the output image and then do a manual preview when you are ready.

Oh ! it was so obvious. "My bad"

I was accustomed seeing the preview button turning red per the Advanced sharpen transformation :

The preview button is grayed out if the output image is up to date and turns red if you change any settings and have not yet updated the output image.

When the recomputing is necessary, would it be possible to make preview red in the scratch and speck removal tools, and other transformations ?

In order to avoid going "to and fro" between the tool dialog box and the image working area, would it be possible to make preview accessible from the keyboard and in a menu accessible by by right-clicking the image input area ?