I have to disagree here... the feature I am looking for is not present. It is true that one can edit an entry in any window, but it is just one entry at a time. While what I am looking for is accessing the Edit window without having to close the Test or Learn window. Maybe not to just edit one entry, but to compare various entries that may appear similar while being learned/tested, or to divide different meanings of a word in separate entries rather than only one, etc...
In short, being able to work in the Edit window without closing the Learn or Test window, and once the work done to be able to resume the learning/testing.
The idea of my suggestion was not the editing, but the access to the Edit window from other windows, without having to close them.