Menu: File > Close
Keyboard: CLOSE
Closes the active drawing window without exiting the program. If you have made changes to the drawing, a message prompts whether you want to save the changes. To save the changes, choose Yes . If you do not want to save the changes, choose No. To return to the drawing, choose Cancel.
If this is a new drawing, you have not named it, and you choose Yes to save it, the Save As dialog box appears for you to name the drawing.
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