Am 17.09.2011 um 21:12 schrieb Honza Hejzl:

Hello,
why that simple thing doesn't work? Does anybody know?

\def\mycap#1#2{\hbox{\hbox{#1}\vtop{#2\par}}}

\setupcaptions[command=\mycap]

Simply I need this:

Fig. 1 The fig is great...
...like any other fig.

I have tried to set this up via table but still can't proceed.

This doesn’t work because the command-key expects a command with one
argument which contains the caption number *and* text.

To write your own caption layout ask Hans to rewrite the code
for the \placefloatcaption (…number and …text) commands for MkIV.

Wolfgang