Option to change disable-for time period?
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I teach 75 minute classes. I normally love f.lux, but when I'm teaching classes I want to have my screen at the usual standard brightness, no matter the time of day. Right now I can click to disable it for an hour, but then about an hour into class it'll start to dim again, and I'll need to go disable it.
How can I change that disable-for-an-hour time period to 75 minutes?
I flip through a good number of apps, so it's not like I can disable it for one particular app, and it's not like I stay in a maximized window.
I know movie mode is 2.5 hours, which would be fine, except movie mode doesn't do what I want, which is the regular-brightness screen.
I could just quit the app entirely, and restart after 75 minutes, but that seems overkill. How can I achieve what I want with f.lux?