1.in the property pane,there is a style tab,we can decide if display the attribition or operation of a class in the class diagram;
2.todo item:It's a strong point of ArgoUML,it can tell you if exist any bad design in your model.this is its originate(copy from the manual book):But what is this “To-Do" Pane anyway. You haven't recorded anything yet that has to be done, so where do these to do items originate.
3.I haven't found the items "redo" and "undo" in the ArgoUML.
In spit of it is difficult to use and incompleted function(missing sequence diagram),I found it is a bit interesting now.