Quite simply, I would like to have the map visible during the trade screen. Even if in a smaller more compact window.
Reasons for this is it is not always simple to know where certain planets, ships, starbases are just from the name, and when trying to trade it would be nice to see where each item is in the world so you can plan trades based on your current needs for distance projection or influence.
And if the map could scroll to where each item is when you click on it to add it to the trade that would be awesome.