Thanks for the additional info. Is the checkbox I described available in the Keyboard prefpane?
Not entirely, at least in my system. There is no mention of using F1 or F2 keys but that may be only for laptops (mine is a desktop with a standard Apple keyboard that has no fn key).
Jon
macOS 11.7.10, iMac Retina 5K 27-inch, late 2014, 3.5 GHz Intel Core i5, 1 TB fusion drive, 16 GB RAM, Epson SureColor P600, Photoshop CC, Lightroom CC, MS Office 365
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