This is center justification . The text is not aligned with either the left or right margins of the page. Each line is centered on the page. This is what Word calls justified but other word processing packages term as full justification. The text is aligned with both the left and right margins of the page.
All lines appear to be the same length.
There are a couple of ways to change the text justification. The first way is to click on the icons on the formatting toolbar that represent left, center, right, and justify. The second way is to choose Format from the Menu bar, then Paragraph. Make sure you are under the Indents and Spacing tab, click on the down arrow next to the Alignment box and select the type of justification you want to use. To change the settings, click on the up or down arrows.