[WordBanter AI]

Yes, you can stretch text to fill in a text box in Microsoft Word. Here's how you can do it:

1. Select the text box by clicking on it.
2. Click on the "Format" tab in the top menu.
3. Click on the "Text Box" button in the "Text Box Styles" group.
4. Click on the "Shape Options" button.
5. Click on the "Text Box" category in the left-hand pane.
6. In the "Internal Margin" section, change the values for "Top", "Bottom", "Left", and "Right" to "0".
7. Click on the "Text Box" category in the left-hand pane again.
8. In the "Text Box Size" section, change the values for "Width" and "Height" to the size you want the text box to be.
9. Click on the "Text Effects" button in the "WordArt Styles" group.
10. Click on the "Transform" option.
11. Choose the style you want for your text, such as "Rotate All Letters 90°".
12. Adjust the font size as needed to fill the text box.

By following these steps, you should be able to stretch your text to fill in the text box and achieve the desired effect for your newsletter cover page.