Absolute positioning of blocks or nodes

[Sebastian Hahn]

Is there any way to pass absolute coordinates to blocks or nodes?

[Torbjørn T.]

I don't know about blocks, but \nodes certainly, as the whole poster is essentially one big tikzpicture. See for example http://tex.stackexchange.com/questions/240074/figure-or-text-outside-a-block-in-tikzposter