If you have already typed text, you can click on the cell to be changed or highlight a range of cells, and then change the formatting. You can turn them off by clicking on the buttons again. Check your work. If you are sitting on a cell and you change the font style or font size, only that cell is affected. The font choices that appear will depend on your computer and printer and what software is installed.
Some printers have more internal fonts that others.
Also typically the more software is installed, the more fonts you will have, especially if you have graphics software installed. You will learn in the third lesson a way to select other font sizes not shown on the font list. The left, center or right options place information at that location within its cell . If the text or number is as wide as the cell, then changing the alignment has no effect. You can change alignment on a single cell or a block of cells.