pr-menu-char-height

pr-menu-char-height is a variable defined in `printing.el'.
Its value is

1

Documentation:
Specify menu char height in pixels.

This variable is used to guess which vertical position should be locked the
menu, so don't forget to adjust it if menu position is not ok.

See also `pr-menu-lock' and `pr-menu-char-width'.

You can customize this variable.