Weird lines in Microsoft Word

These are called "Printers Crop Marks". They indicate the page margins, they are used by industrial printers to know where to slice the paper up to fit it in publications.

You can remove them by doing the following:

1. Click File
2. Click Options
3. In the pop-up, select Advanced
4. Scroll to the "Show Document Content" section
5. Untick the option called "Show crop marks"

They're called crop marks

To show or hide them just open File > Options > Advanced and click on "Show crop marks"

There are also other formatting marks in File > Option > Display

See also

• Print crop marks in corners of a document
• How to quickly show or hide crop marks in Word?