Highlight shortcut doesn't work in Preview (but button does
The keyboard shortcut (Ctrl-Command-H) does not highlight (returns a 'ding' sound) and the option is greyed out. However, I am able to highlight when pressing the toolbar button.
As suggested on other posts, I've deleted the various .com.apple.Preview files from /Library/Container and /Library/Preferences, and restarted the machine. Problem persists.
This user has the same problem:
https://discussions.apple.com/thread/8647870?answerId=250013816022#250013816022
I am running OSX 10.14.6 and cannot upgrade to 10.15
thanks for any help.
MacBook Air 13″, macOS 10.12