On 2013–02–15 Mari Voipio wrote:

> Today I feel like a total ConTeXt dummy...

As long as it's only today you're much better off than me ;)

> The problem: I have 3*1 combination where the end graphics are the
> same size, but the middle graphic is much shorter. With a standard
> \startcombination\stopcombination I can easily get all three
> side-by-side, but they are bottom-aligned while I'd need them
> middle-aligned.

How about this:

\useMPlibrary [dum]
\setupcombinations [location=middle]
\starttext

\startcombination[3*1]
  \startcontent \externalfigure                \stopcontent
  \startcaption Foo                            \stopcaption
  \startcontent \externalfigure[.][height=2cm] \stopcontent
  \startcaption Bar                            \stopcaption
  \startcontent \externalfigure                \stopcontent
  \startcaption FooBar                         \stopcaption
\stopcombination

\stoptext


Marco