To insert a horizontal line in LibreOffice
- Hide the required bar via "view" > "toolbars" > "not a Draw", if you have already.
- Tap on the lines icon (see image).
- Now click two times on the point in the file where the horizontal line should begin.
- Press and hold the mouse and drag horizontally to the left or to the right.
- You want to change the thickness or color, tap again on the line. As a result, the required bar opens.

Insert line in LibreOffice
In a further practical tip read, as a header or footer in LibreOffice, insert.