Instead of changing the font face and font size on each page, we can help you customize your stylesheet so that you can make changes globally to all of your pages easily. Let us know if you need help! 

Text Alignment

To adjust the text alignment: don't use the spacebar, it adds extra HTML code and makes the page unstable.
Instead, select the text you want to align, highlight the text with your cursor and select one of the text Justify/Align icons in the second row.