LibreOffice 25.2 Help
Select the text that you want to center on the page.
Choose Insert - Frame.
In the Anchor area, select To page.
In the Size area, set the dimensions of the frame.
In the Position area, select "Center" in the Horizontal and Vertical boxes.
Click OK.
To hide the borders of the frame, select the frame, and then choose
. Click the tab, and then click in the box in the area.To resize the frame, drag the edges of the frame.