[texhax] \vskip at beginning of file

[David Carlisle]

On 19 July 2016 at 12:02, Philip Taylor <p.taylor at rhul.ac.uk> wrote:
> Rodolfo Medina wrote:
>>
>> Is it possible to avoid that ugly trick, and how?
>
> \leavevmode \vskip ... is one way, \topglue ... is another.
> Philip Taylor
>

The \topglue macro is certainly the best of these options.

using \leavevmode or \quad is bad as it introduces a spurious
paragraph (and consequent extra space)

using \hbox{} (or \null which is same thing) can have unwanted effects
via \prevdepth

\topglue uses \hrule height 0pt as the basic node to prevent the skip
being discarded but takes care not to disturb \prevdepth, and corrects
for \topskip.

David