ENG mode, n+1?

[Han]

(01-14-2014 03:03 AM)RMollov Wrote:  HP48G manual, page 4-10:
"ENG" Sets the display mode to Engineering using the number on level 1 for the number of mantissa digits to be displayed after the first significant digit.

I think this explains it almost right (emphasis on the word "after" is mine). Perhaps what is lacking is that engineering mode always uses powers of tens that are multiples of three since it is fairly common to separate the digits of a number into groups of 3 digits. So ENG 4 means display the number is such a way that only 4 digits appear AFTER the most significant digit once proper exponents have been accounted for. The placement of the decimal point is completely determined by the exponent.