As with many other tools, you can configure the way package names are displayed in the Editor. Because of the nature of this tool, you need to be a little more aware of the precise nature of these commands in order to avoid confusion. This information can be configured using the Package panel of the Editor Preferences dialog shown in The General tab of the Editor Preferences dialog.
Click Show Package Names to toggle display of package names in the main areas of the buffers and various definitions views.
Type a package name into the text field to change the current package in the Editor. Click the 
button to confirm the package name, or the button 
to display a completion list for all package names. Note that this does
not
change the package currently displayed; it merely changes the Editor's notion of "where" it is in the environment, and this in turn affects the way symbols are printed in the buffers and various definitions views.
By default, the current package is
CL-USER
.