Big Sur keyboard shortcut to select text Before upgrading to Big Sur I was able to use Shift-Command-Left/Right arrow to highlight a single word while typing.  This was in any app - email, browser, text, etc.
After upgrading to Big Sur, that command now changes the color profile.
For what it's worth, Shit-Left/Right arrow will still highlight a single character.  Shift-Command-Left/Right arrow will still highlight the start/end of the line of text.  And Option-Left/Right arrow still moves the cursor one word at a time.
I'm just missing the option to highlight one word at a time.
I know how to add keyboard shortcuts but not sure the best way to change this back?
Testing in macOS Big Sur and macOS Catalina, the shiftoptionleft/right arrow keyboard shortcut highlights one word at a time.
By default shiftcommandleft/right arrow highlights from the cursor to the end/beginning of the line.