[bug #61507] want mechanism for more reliable absolute vertical positioning

[Dave]

Follow-up Comment #5, bug #61507 (project groff):

[comment #4 comment #4:]
> 1) the escape sequence '\v' is for local motions (are contained within a
> line, see CSTR #54, paragraph 11.1).
>   The absolute position indicator '|' does not make sense there.

The groff manual says that \v can take the | modifier; it describes \v
<http://git.savannah.gnu.org/cgit/groff.git/tree/doc/groff.texi?id=2290508c#n13082>
as: "Move vertically; usually from the current location on the page (if no
absolute position operator '|' is used)."

> 2) The absolute position '0' (zero) is the first usable printable line,
> not the distance from the edge of the paper.
> The edge can't be a printable line.

Thank you, this is useful information, though it seems to apply more to bug
#60820, which seeks to clarify how | works, than to this bug, which requests a
reliable way (separate from |, which has an entrenched troff history) to
measure from the page boundary.

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