[Haskell-cafe] Make two windows work together

[xu zhang]

Hi there,

I am trying to make a sub-window of one window and make them work
together. I mean, if I zoom or transform some content in one of the window,
the other one works in the same way.
What I have done so far is just open a new window which have the same
drawing view as the original one, but when I try to change some content in
one window, the other one does not work at the same time. They are separate.
Can anyone give me some hint on how to make them work at the same time not
separate anymore?

Thank you so much!
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