If I take note of the out of gamut warning triangle and click to select the nearest in gamut color, and do this for all the colors in my image, is this a good method to align my colors to printing to a wide format printer.
As I understand it this action is basically for four-colour process printing (CMYK inks), which is one destination for my image files. The other is as I mentioned the wide format digital printing.
using Illustrator, which functions same as Photoshop.
as a side thing, regardless of reproduction, I find that using this correction is helpful in toning down too bright colors, making them more chalky-ish and easier on the eye, so is a helpful guide to not getting too carried away and pull colors back to a reasonable saturation. There are however some images that I purposely want vivid colors because it's an effect relating to the image concept, and any dulling down is not wanted, so for these I will probably also keep a separate layer or file of the same artwork without fixing the gamut warning for display only/non-print uses.