Ahh Ok, I understand now, as I can see several elements which have altered, (e.g. sharpening, details in the darks are now visible etc, as well as the colour change) A 'preset' in essence, is a series of filters put together to make an 'action' (you can make your own actions in PS, of which I often do, when I want to edit a 'batch' the same way)
In L3 I suspect its instant?
In PS, you can also obtain 'actions' made by others and I have a few myself but the annoying thing is, you don't have a 'preview' they're just called a name (with my own, I 'try' to call them something that actually makes sense, like 'Heavily contrasted B/W=Black and white but some of the same people come up with are just random, like Kahwe)
But the positive thing is, all the actions make individual 'layers', of which you can tweak after, if you add a layer mask!
Some of the actions make tons of layers but that's also a good way of learning, as you can turn each layer off individually to see what difference each one makes.
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