How to Change the Default Mail Font in AIM Mail or AOL Mail

At any lake in summer — and sometimes winter, too — you can witness what I'm observing now: people bike, drive, walk and hike in groups and pairs, sometimes alone, from far and near, from city, village, town and farm to jump, slide, run and fling into us humans' other default element, the water.
Speaking of walking and defaults, you can spare yourself going around in circles with your mouse a lot in AIM Mail and AOL Mail with different defaults:
›› Don't want to use Arial for all email purposes? Increase the font size every time you start a new message? Here's how to change the default font face, size and color in AIM Mail and AOL Mail.