Hi all,

2htdp is really neat and very useful, so thank you designers and
programmers of 2htdp!

Sometimes I wish to place the window/frame on the screen at a particular
position, but the default sets it to (2, 2) as defined here:

https://github.com/racket/htdp/blob/master/htdp-lib/2htdp/private/world.rkt#L216

I'd like the user to be able to specify these values, but I'm not confident
about doing changes in there as there seem to be several layers in between
big-bang and world%, and a particular DSL.

I suppose a clause must be added around here:
https://github.com/racket/htdp/blob/master/htdp-lib/2htdp/universe.rkt#L139
though I'm not sure what the format for a pair of numbers would be, or if
it would be better in on-draw instead (or if parameters wouldn't be better
for this, but 2htdp doesn't seem to use many parameters).

Any advice?

Thanks!
Laurent

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