Could you please post a screenshot showing your entire InDesign screen as well as the Swatches panel with the greyed out New Swatch icon?
Thanks for offering to look at this. I see what the problem is:
Pick Swatches | If None, Registration, or Paper is selected - by default I guess, then the New Swatch icon is not available
Pick any user defined swatch and the New Swatch icon is available.
Or, I can pick the drop down control in the UR corner of the Swatch panel | New Color Swatch and that does work regardless of what is picked in the list of existing swatches.
There you go! I'm glad I was to... uh... not help...?
Can anyone explain why the new swatch icon is greyed out in these cases even though you're able to pick it from the menu? This makes no sense.
If you select a user-created swatch and either click the New Swatch button or drag the swatch to the New Swatch button, you're creating a duplicate copy. For example, if it's "C=75 M=5 Y=100 K=0", the new swatch will be called "C=75 M=5 Y=100 K=0 copy".
But the four swatches we're talking about—None, Registration, Paper and Black—can't be deleted and they can't be duplicated. That's why their names are surrounded by square brackets.
Graying the names is probably better than having nothing at all happen when you click on them.
Thanks, that makes sense. Now that I think of it I've always been annoyed by the behaviour of the button, because it doesn't do what it says it will do. Really, the way it is at the moment it's a "Duplicate Swatch" button.
That's not quite true. It's true if you have no Fill or Swatch color selected.
If you have one active in the Color panel or the Gradient panel, then that color or gradient is selected, and clicking New Swatch creates one with those values.