$^

• HANDLE->format_top_name(EXPR)
• $FORMAT_TOP_NAME
• $^

  The name of the current top-of-page format for the currently selected output channel. The default is the name of the filehandle with _TOP appended. For example, the default format top name for the STDOUT filehanlde is STDOUT_TOP.

  Mnemonic: points to top of page.