The JC command centers
the designated line of text that contains the line command based on
the left and right boundary settings.
Optional Argument
n
specifies the column
position on which to center the designated line of text. Follow the n argument with a space.
Details
The JC command centers
a designated line of text. Unless you specify a numeric argument,
centering is based on the current boundary settings set by the BOUNDS
command. A numeric argument overrides these boundary settings.
Comparisons
Like the JL, JJL, JR,
and JJR commands, the JC and JJC commands align text.