Microsoft has changed the default font in Word with one of the latest updates. Instead of Calibri for normal text and Calibri Light for headings, the fonts Aptos and Aptos Display are now preset.

To change the default Heading, Quote, Title font in Word, follow these steps-Right-click on the Heading 1. Select Modify. Set the font family, font size, style, alignment, etc.

In terms of ranking factors related to font size, only the heading element (H1, H2, etc.) was considered a ranking factor. Google Patents Related to Headings.

Google is testing a larger font size in ad headlines. The first headline displays in a considerably larger font on line one with a second headline appearing below it. The test was spotted by PPC ...

You can also change the Heading font–the only one that doesn’t change automatically with the default. Make sure not to check ‘Current document only” before clicking OK.

Google's John Mueller said that the size of your header tags, i.e. H1s, H2s, etc, does not matter for SEO or ranking purposes. John said it might matter for users and conversions but for SEO, nope.