Font presets

Hi- had a question about font presets and how to keep a default/preset for each paragraph or block. For example, if the main body text font will be book Antiqua size 14 throughout…how to make this a default setting so that it doesn’t have to be manually changed all the time?

Using TinyMCE advanced editor (in addition to Gutenberg block editor), but their support doesn’t seem to respond. Any help or suggestions much appreciated!

Thanks!

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