How old is your machine? There are differences, below is from an older manual:
Setting 85 and Parameter 134 both affecr corner rounding. Also you can use G187 in a program to override the Setting 85 value.
This is from a more recent manual:
G187 Setting the Smoothness Level (Group 00)
G-187 is an accuraccy command that can set and control both the smoothness and max corner rounding value when cutting a part. The format for using G187 is G187 Pn Ennnn.
P Controls the smoothness level, P1(rough), P2(medium), or P3(finish).
E Sets the max corner rounding value, temporarily overriding Setting 85 "Max Corner Rounding".
Setting 191 sets the default smoothness to the user specified "rough," "medium," or "finish" when G187 is not
active. The "medium" setting is the factory default setting. NOTE: Changing setting 191 to "Finish" will take longer
to machine a part. Use this setting only when needed for the best finish.
G187 Pm Ennnn sets both the smoothness and max corner rounding value. G187 Pm sets the smoothness but
leaves max corner rounding value at its current value. G187 Ennnn sets the max corner rounding but leaves
smoothness at its current value. G187 by itself cancles the E value and sets smoothness to the default smoothness
specified by Setting 191. G187 will be cancelled whenever "Reset" is pressed, M30 or M02 is executed, the
end of program is reached, or E-stop is pressed.
An open mind is a virtue...so long as all the common sense has not leaked out.