How do I do that? In that way I should be able to somehow see the diffrence between the original and the changed picture. But I don’t know how to toggle between them, help!
in the viewer use the  key to switch between then A and B buffer. make sure to load a separate image into each buffer by clicking on the lefthand side of a node once you have selected either the A or B Buffer.
you can also use the ‘C’ compare mode. which will slide horizontal, vertical or fade between the two buffers.
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