How do I change font in the Page Editor?
We decided not to include a font option in the new page editor.
One of the main reasons behind this is the increased use of mobile devices to visit websites - the fonts available in our previous editor were very Windows-centric, and if a font wasn't available, particularly on iPhones, the text would appear in something that looks like Times New Roman. If we included a font option, we wouldn't be accurately showing how text would work for many of your visitors.
We felt it's better to rely on the font of the website template itself - and if a font is being set quite frequently across a site, it may be worth looking at whether the default for the website itself is correct. For more advanced pages where controlling the font matters, the Custom CSS option is available if you're writing your own code for styles.