Hi,

Some/oftentimes, the more I read the scattered
documentation, the more I'm confused... and
wasting my valuable time testing and trying to
figure out how things work.

Here is, for example, why...

(1) From  \showlayout

topspace       \topspace
top                \topheight

(2) From "ConTeXt An Excursion", page 74

page 71, \setuplayout command parameters

topspace       dimension
top                (not referenced)
topheight       (not referenced)

page 74, table 33.2 parameters for page design.

topspace       \topspace
top                (not referenced)
topheight       \topheight

(3) From "ConTeXt main manual"

page 24, \setuplayout command parameters

topspace       dimension
top                dimension
topheight       (not referenced)

(4) From http://wiki.contextgarden.net/Layout

topspace      \topspace
top               \topheight
topheight       (not referenced)

(5) From http://texshow.contextgarden.net/command/detail/221

topspace       dimension
top                dimension
topheight       (not referenced)

What is

- topspace ?
- top ?
- topheight ?

Please and thank you,
Alan