You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit 852be0c8cb3c3c9a68b6085a38a969671ceb9f02)
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.