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 box 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. You can use completion to reduce typing, by clicking 
which allows you to select from a list of all package names which begin with the partial input you have entered. See Completion for detailed instructions. When you have entered the complete name, click the 
button to confirm the package name.
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
.