How to get rid of align(horizon) additional vertical space?

Questions
,
1

align(horizon) often adds some vertical whitespace, i.e. align(center+horizon, $f=g$) is a little taller than align(center,$f=g$) For large diagrams this can be significant. Is it possible to get rid of this additional whitespace? I am trying to do align(center+horizon, stack(dir:ltr, ...)) where the objects in my stack are of varying heights, but for some reason this is significantly taller than the height of the tallest item in the stack.

2

Can you share a minimal example of both cases where the difference is visible?

3

In this code, there is a small but not really stand-out difference between the vertical positioning of the first character a.

#align(horizon,[a]) // vs just a\
#let f(x) = [#x]
#for i in array.range(50) { [#i\ ] }

If I could understand how to adapt this code so that the top of the second box was aligned with the top margin of the page, that would perhaps help me.

#stack(
  dir: ltr,
  rect(height: 40pt),
  rect(height: 120pt),
  rect(height: 90pt),
)

EDIT: I played around a little more and I have an example which is more representative of my problem, from this angle perhaps the problem is that #align does not properly account for space which is needed for the bibliography? Here is my bibliography file, tmp_refs.bib

@book{aguiarMonoidalFunctorsSpecies2010,
  title = {Monoidal Functors, Species, and {{Hopf}} Algebras},
  author = {Aguiar, Marcelo and Mahajan, Swapneel Arvind},
  date = {2010},
  series = {{{CRM}} Monograph Series / {{Centre}} de Recherches Mathématiques, {{Montréal}}},
  number = {v. 29},
  publisher = {{American Mathematical Society}},
  location = {{Providence, R.I}},
  url = {http://pi.math.cornell.edu/~maguiar/a.pdf},
  isbn = {978-0-8218-4776-3},
  pagetotal = {784},
  keywords = {Categories (Mathematics),Combinatorial analysis,Hopf algebras,Quantum groups,Symmetry groups}
}

and here is a small, if not minimal, document that shows the behavior I’m interested in:

#lorem(450)
#cite(<aguiarMonoidalFunctorsSpecies2010>)
#align(horizon,[a])
#bibliography("tmp_refs.bib")

I am not satisfied with the vertical position of this letter ‘a’. It is positioned too low, it is sitting on top of the bibliography and I would like it to be more vertically centered in the gap between the end of the main text and the bibliography.

4

Hello @gadget142, I have renamed your post “How to get rid of align(horizon) additional vertical space?”. You can take a look at How to post in the Questions category, we recommend that

5

In the first example, align introduces a parbreak which causes a bigger spacing between the a and the 0. Additionally, the align(horizon, ...) does try to align your a vertically on the page, so it pushes the page content which comes after it down as much as possible and that also produces a bit of spacing (as there is a bit of spacing between the last item on the page and the margin).

Example1 
// Column 1
a\
#let f(x) = [#x]
#for i in array.range(11) { [#i\ ] }
#colbreak()

// Column 2
#align("a")
#let f(x) = [#x]
#for i in array.range(11) { [#i\ ] }
#colbreak()

// Column 3
#align(horizon, [a])
#let f(x) = [#x]
#for i in array.range(11) { [#i\ ] }

test

I don’t quite understand the problem in the second example.

In the third example I think you are looking for #v(1fr).

Example3 
#lorem(500)
#v(1fr)
a
#v(1fr)
#lorem(50)

test