You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit b3138094d90d9a1861f0e10af33500f7d508e29c)
HANDLE->format_lines_per_page(EXPR)
$FORMAT_LINES_PER_PAGE
$=

The current page length (printable lines) of the currently selected output channel. The default is 60.

Mnemonic: = has horizontal lines.