Package

The Soyatec mechanism of Package preferences has two different levels: global and package.
From the menu bar, Select Window > Preferences > eUML2 > Class Diagram > Package

1. The Eclipse preferences concerning package are:
(first Level)

In the stereotype area, you can decide to either show or not show the stereotype on packages
In the Package name format area, you can decide either to have:

a short name

or a complete name

According to the general eUML2 preference mecanism, these preferences will not change the existing diagram. Existing diagrams can be changed using the diagram editor preferences. Using the Apply button allows you to change the existing package's preferences, while clicking on the OK button will just validate the preferences for new packages.

2. The class diagram preferences concerning package are:
(second Level)

In the stereotype area, you can decide to either show or not show the stereotype on packages
In the Package name format area, you can decide either to have a short or a long name.

You can work at class diagram level using the diagram editor's popup menu.
Open your class diagram editor and click inside the diagram. In order to work at global diagram level, be sure not to select any element.

3. The Package preferences concerning package are:
(third Level)

In the stereotype area, you can decide to either show or not show the stereotype on packages
In the Package name format area, you can decide either to have a short or a long name.

You can work at package level by selecting one package then right click to open the popup menu and finally choose View selector.
Here is the example: