Double clicking sliders not working
I am use to double clicking on a slider name it resets to zero. LR has not been allowing me to do this for a while now. I am running an iMac Mojave. I reset my preferences, but still not working.
Any fixes known?
Thank you in advance.
EDIT: I cannot find where "Help menu > System Info?" is. In my Help menu it does not show System Info.
My LR version is 8.4.1 release
