Feature request: view in grayscale

[MatzElectronics]

Why?

• So when we do a textbook for this it can be in black & white
• Teachers printing worksheets
• Individuals with disabilities?

Also

• Because I think it will be easy to implement

[JohnKauffman]

Also useful when printing code to paste onto poster with a trace students make with marker. When trace is displayed on wall, other students can see the code. We have been doing this to date: screenshot, paste to Word, crop/enlarge, print. We are getting OK-enough results but proper B/W would be more readable.

[MatzElectronics]

This is now working, but I'm keeping it buried until we map the colors to an "equivalent" grayscale value and create a menu option to toggle it. In demo, just add &grayscale=1 to the URL in your browser.

[MatzElectronics]

Feature exists and is working using a "secret" URL tag. Now depends on non-volatile user settings/preferences #997. Closing.