This conversation has been merged. Please reference the main conversation: Lightroom Classic: TIFF compression settings have no effect when Lightroom sends image to Photoshop for editing
April 13, 2020 I just tried this. Set the Lr Classic CC external editing preferences for Adobe Ps CC to TIFF with compression None. and then set compression to ZIP. In both cases the resultant TIF was the same size. Both my Lr and Ps are up to date. Why no compression?
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