Hi @Guenterm
personally, I’m no big fan of split preview, but prefer to toggle between two versions instantly, that is without any delay from being recalculated – comparable to switch on/off the layer in a pixel editor.
– And yes, all NIK Filters /Nik Collection (except the ‘new’ Perspective Efex) offer Split and Toggle View.
What I like about PL4’sss behaviour is to compare the activated state of tools (White balance color picker, HSL Hue picker, Local adjustments) with the ‘automatically’ preselected state without that tool – for ease of use (see your comment Compare Before/After affect of the HSL tool). With that I’m somewhat sceptic about a more detailed (manual) choice.
But what I’m missing is the possibility to compare 2 (or more) non-consecutive pics – if possible with zoom-capability (see Compare several photos in same view)
– and yes, FastStoneViewer can do it, but I would like it here in PL4 (again, for ease of use).
It’s so long ago, that Lightroom 5 (and ON1 PhotoRAW) realized similar functions. And this old LR allows softproof (side-by-side view).
Wolfgang