How do I customize the schedule?
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 My computer is running 10.11.6 because that's as far as it can be upgraded. Because I spend so much time looking at the computer screen, I want to keep flux on all the time. My flux version is 39.987. How do I do this? 
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 f.lux has three times of day, and you can adjust the setting for each one separately. Click each tab one at a time and it the way you like, or start with a preset (from the pulldown menu). 
