Of old I have found the wolf fence tactics useful: Put for example an X at the beginning of a suspected section and somewhat further a Y. OIf they bracket the culprit the offending space will be between them. Otherwise narrow the fence.

dr. Hans van der Meer


> On 29 Sep 2020, at 14:26, Denis Maier <denis.maier.lists@mailbox.org> wrote:
> 
> Hi,
> 
> I have ended up with unwanted whitespace at the beginning of my document. The environment definition is already quite complex, so I cannot easily tell where the whitespace is coming from. Any advice how I could track that down? Are there some tricks for this?
> 
> Best,
> Denis
> 
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