Hallo Hans, I have played with positioning text in layers. I noticed that parameter "location=t" \setlayer[MyLayer][...,location=t,...]{...} behaves the same way as "location=c". It seems to me it is the bug in optimized definition of \alignedbox. If I use commented version of \alignedbox from source file core-box.tex it is OK. Can you look at it, please? Test file: ------------------------------------------------------------------ \definelayer[PositionText][position=no,corner=buttom,height=\textheight,option=test] \def\PosText(#1,#2)[#3]#4{% \setlayer[PositionText][x=#1,y=#2,location=#3]{#4}% \ignorespaces} \setupbackgrounds[text][background={PositionText}] \switchtobodyfont[20pt] \starttext \PosText(.3\textwidth,.3\textheight)[c]{Center} \PosText(.3\textwidth,.3\textheight)[t]{Top} \PosText(.3\textwidth,.3\textheight)[b]{Bottom} \PosText(.3\textwidth,.5\textheight)[l]{Left} \PosText(.3\textwidth,.5\textheight)[r]{Right} \PosText(.7\textwidth,.5\textheight)[tl]{TopLeft} \PosText(.7\textwidth,.5\textheight)[tr]{TopRight} \PosText(.7\textwidth,.5\textheight)[bl]{BottomLeft} \PosText(.7\textwidth,.5\textheight)[br]{BottomRight} Ap\hskip1.5em \alignedbox[b]\hbox{ApB}\hskip1.5em \alignedbox[c]\hbox{ApC}\hskip1.5em \alignedbox[t]\hbox{ApT} \stoptext