How do I increase significant digits in Grapher?
Solution 1:
All the numbers settings can be found via Grapher → Preferences → Numbers.
You can set the “Notation” setting to “Engineering” to display numbers as 123,4568e3 (7 significant digits) instead of 1,2346e5 (5 significant digits).
Perhaps the “Number of Decimals” setting is of interest, too.