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# Jwd Session Manager

Jwd provides a user interface called the session manager. The session manager allows the use of several document windows at one time within the same session. There are two types of document window: execution windows and script windows:
- An execution window allows sentences to be evaluated. When you type into the execution window and press Enter, the sentence you entered is executed, and the result is displayed below.
- A script window allows sentences to be entered without being evaluated. Typically you use script windows to write your applications, then run the scripts by loading them into an execution window.
Both window types represent ordinary files that can be saved during the session for use later on. Both are Windows edit controls, and you can use standard Windows commands to manipulate them, for example you can cut and paste between the windows and the Clipboard. You can move them about, resize them and minimize or maximize them.

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