This option controls the threshold for the number of rows in a frame to be truncated when printed to the console.
If a frame has more rows than
max_nrows, it will be displayed
truncated: only its first
rows will be printed. Otherwise, no truncation will occur.
It is recommended to have
head_nrows + tail_nrows <= max_nrows.
max_nrows value. Initially, this option is set to
max_nrows value. If this option is set to
to a negative value, no frame truncation will occur when printed,
which may cause the console to become unresponsive for frames
with large number of rows.