How to set minimum size for class in class diagram

[Farrukh Najmi]

I have turned of visibility for all attributes and element in my diagram.
When I drag and drop a class the box is too big. How can I make the default size be as small as possible without manually resizing for each class?

[JPHespanha]

Have you tried:

1. select all classes and from Properties in the context menu, select Feature Visibility and Wrap features;
2. From the main menu, select Element -> appearance -> Autosize or simply hit the Alt+Z key.