Sometimes, I open a class in an editor, and need to compare it with another class. Currently, I have to split the editor pane so that the two classes are both shown. The problem: you can't see the structure of the class in an editor pane (not its purpose..). However, if I open the first class, and the structure pane is visible - I have its structure, then if I could "freeze" the structure pane and navigate to the second class - it would enable the developer to compare the structures. Such a feature is available in Jdeveloper and is very useful (to my own taste anyway..). This should be a button in the structure pane's toolbar, if implemented.