By default, the environment always re-uses an existing window if possible. So, if you choose Tools > Editor , an existing editor appears if one has already been loaded.
If you prefer, you can configure the environment so that a new tool is created every time you choose one of the options under the Tools menu. You can do this only for specific tools, or for most tools in Common LispWorks.
To switch off the reuse of a specific tool:
Reuse all tools is one of the options displayed on this dialog. By default, this is selected, indicating that the active window is re-used.
The active windows are now no longer reusable. Next time you create a new instance of a tool from the Tools menu, a new instance of it is created.
Note: You can also control the reuse of tools from the Works > Customize > Reusable menu in the podium.