Hi there!
Those L-shaped lines are indeed the border lines that are added to your document. To remove them, you can follow these steps:
- Open your document in Microsoft Word.
- Click on the "Page Layout" tab at the top of the screen.
- Click on the "Page Borders" button in the "Page Background" section.
- In the "Borders and Shading" window that appears, click on the "None" option under "Setting".
- Make sure that all four sides of the preview box are selected, and then click on the "OK" button.
This should remove the L-shaped lines from each corner of your document. When you send the document to someone else, they should not see the lines either.