Click the Close (x) button in the document window. If you have edited the document since saving it last, Word asks whether you want to save it.
Click the Yes button to save your changes.
Word closes the document.
INTRODUCTION
When you finish working on a document, you can close it and continue to work on other documents. You can close a file with or without saving changes. If you have been working in a document and you try to close it, Word asks you whether you want to save the document before it closes.
TIP
Grayed-out Buttons
When Word has no documents open, only a few buttons are available on the Standard toolbar. The other buttons are grayed out, meaning their features are not currently available.
TIP
No Save
Click Cancel to continue working in the document. Otherwise, click No if you want to close your document but don't want to save your changes; in this case the document reverts to the previously saved version.